Answer:
x = 2nπ ± π/3 or x = 2nπ ± cos⁻¹(3/4)
100 Points. Algebra question, photo attached. Graph the function. Describe its key characteristics. Thank you!
Answer:
Domain = (-∞, ∞) Range = (-∞, ∞)
End Behavior: As X -> -∞, Y -> -∞ | As X -> ∞, Y -> ∞
Inflection Point: (2,0)
Step-by-step explanation:
Write v as the sum of two vector components if v = -5i+6j and w = 3i+4j
Vector v can be written as the sum of two vector components, [tex]v_x = -5i[/tex] and [tex]v_y = 6j[/tex]
To write vector v as the sum of two vector components, we need to decompose it into two vectors along different directions.
v = -5i + 6j
w = 3i + 4j
We can decompose vector v into two components, one along the x-axis and the other along the y-axis.
Let's denote the component along the x-axis as [tex]v_x[/tex] and the component along the y-axis as [tex]v_y.[/tex]
The x-component, [tex]v_x,[/tex] represents the projection of vector v onto the x-axis and can be found using the dot product of v and the unit vector i:
[tex]v_x = v . i = (-5i + 6j) . i = -5i . i + 6j . i = -5[/tex]
Similarly, the y-component, [tex]v_y,[/tex] represents the projection of vector v onto the y-axis and can be found using the dot product of v and the unit vector j:
[tex]v_y = v . j = (-5i + 6j) . j = -5i . j + 6j . j = 6[/tex]
Now, we can write vector v as the sum of its components:
[tex]v = v_x + v_y = -5i + 6j[/tex]
So, vector v can be written as the sum of two vector components: -5i along the x-axis and 6j along the y-axis.
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Patient’s wt: 60 lb Medication order: 0.5 mg/kg Stock medication: 10 mg/mL
1. The weight of the patient in kilograms is 27.216 kg. (60 lb * 0.4536 kg/lb = 27.216 kg)
2. The total dosage of medication required for the patient is 13.608 mg. [tex](0.5 mg/kg \times 27.216 kg = 13.608 mg)[/tex]
3. The patient should be administered 1.3608 mL of the stock medication. (13.608 mg / 10 mg/mL = 1.3608 mL)
To calculate the necessary values based on the given information, let's follow the steps below:
Determine the weight of the patient in kilograms:
Given that the patient weighs 60 lb, we can convert this to kilograms using the conversion factor of 1 lb = 0.4536 kg.
Weight (in kg)[tex]= 60 lb \times 0.4536 kg/lb = 27.216 kg.[/tex]
Calculate the total dosage of medication required for the patient:
The medication order is 0.5 mg/kg, and the patient weighs 27.216 kg.
Total dosage [tex]= 0.5 mg/kg \times 27.216 kg = 13.608 mg.[/tex]
Determine the amount of stock medication required in milliliters (mL):
The stock medication is available in a concentration of 10 mg/mL.
To find the volume required, we need to divide the total dosage by the concentration of the stock medication.
Volume (in mL) = Total dosage (in mg) / Concentration (in mg/mL) = 13.608 mg / 10 mg/mL = 1.3608 mL.
Therefore, based on the given information, the weight of the patient is 27.216 kilograms, the total dosage of medication required is 13.608 milligrams, and 1.3608 milliliters of the stock medication should be administered to the patient.
Please note that when administering medication, it is crucial to follow the guidance of a healthcare professional and consider other factors such as the specific medication instructions, patient's condition, and any allergies or contraindications.
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Question: A patient weighs 60 lb, and the medication order is 0.5 mg/kg. The stock medication is available in a concentration of 10 mg/mL.
Based on this information, calculate the following
What is the weight of the patient in kilograms? (1 lb = 0.4536 kg)
What is the total dosage of medication required for the patient?
How many milliliters (mL) of the stock medication should be administered to the patient?
Please provide the necessary calculations and steps to find the answers based on the given information.
8. The data in the table illustrate a linear function. x -3 0 3 6 y -5 -3 -1 1 What is the slope of the linear function? Which graph represents the data? mic 8-Y 0 X
Slope = 8/3
Given,
The table of linear function.
x : -3 , 0 , 3, 6
y : -5 , -3 , -1, 1
Slope = change in y over change in x
Slope = -3-(-5)/0 - (-3)
Slope = 8/3
Passing point = 0,-3
y-y1 = m (x - x1)
y-(-3) = 8/3(x - 0)
y + 3 = 8/3 x
y = 8/3 x -3
Hence, slope = 8/3 and linear function = y = 8/3 x -3
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A function f is given, and the indicated transformations are applied to its graph. Write an equation for the
final transformed graph.
(4.1) f(x) = |x|; shrink vertically by a factor of (3)
1
2
, shift to the left 1 unit, and shift upward 3 units.
(4.2) f(x) = (2) √
x; reflect in the x−axis, shift 1 units upwards
(4.3) f(x) = (2) √
x; reflect in the y−axis, shift 2 units downw
The final transformed graphs are 1) f'(x) = (1/2)|x + 1| + 3, 2) f'(x) = -√x + 1 and 3) f'(x) = -√x - 2.
1. Break down the transformations step by step.
Start with the function f(x) = |x|.
a. Shrink vertically by a factor of 1/2: Multiply the function by 1/2.
g(x) = (1/2)|x|.
b. Shift to the left 1 unit: Replace x with (x + 1).
h(x) = (1/2)|x + 1|.
c. Shift upward 3 units: Add 3 to the function.
f'(x) = (1/2)|x + 1| + 3.
Therefore, the equation for the final transformed graph is f'(x) = (1/2)|x + 1| + 3.
2. Start with the function f(x) = √x.
a. Reflect in the x-axis: Multiply the function by -1.
g(x) = -√x.
b. Shift 1 unit upward: Add 1 to the function.
f'(x) = -√x + 1.
Therefore, the equation for the final transformed graph is f'(x) = -√x + 1.
3. Start with the function f(x) = √x.
a. Reflect in the y-axis: Multiply the function by -1.
g(x) = -√x.
b. Shift 2 units down: Subtract 2 from the function.
f'(x) = -√x - 2.
Therefore, the equation for the final transformed graph is f'(x) = -√x - 2.
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Two triangles can be formed using the given measurements. Solve both triangles.
A = 59°, a = 13, b = 14
The value of the angles are::
67.4°, C = 53.6°, c = 12.2; B = 112.6°, C = 8.4°, c = 2.2
Here, we have,
angle A = 59° and sides a = 13, b = 14.
Lets find remaining angles are B and C and the remaining side c.
Law of sines : a/sinA = b/sinB ⇒ sinB = (b*sinA)/a
sinB = (14*sin59o)/13 = (14*0.857167)/13 ≅ 0.923
B ≅ sin-1(0.923) ≅ 67.384.
There are two triangles, B₁ = 67.4 and B₂ = 180 - 67.4 = 112.6
find the angle c for B₁ = 67.4
A+ B +C = 180.
Angle C = 180 - (59 + 67.4) = 53.6.
Law of sines : b/sinB = c/sinC ⇒ c = b*sinC/sinB
c = (14)*sin(53.6)/sin(67.4) = (14)*(0.805)/(0.923) = 12.21.
now, we have,
find the angle c for B₂ = 112.6
A+ B +C = 180.
Angle C = 180 - (59 + 112.6) = 8.4.
Law of sines : b/sinB = c/sinC ⇒ c = b*sinC/sinB
c = (14)*sin(8.4)/sin(112.6) = (14)*(0.146)/(0.9232) = 2.27.
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Solve five and six-eighths plus four and four-fifths minus two and six-tenths equals blank line
The solution for the given expression is 7 + 5/12
How to solve this expression?First we need to write the expression, using fractions, we will get:
(5 + 6/8) + (4 + 4/15) - (2 + 6/10)
We can group like terms, and we will get:
(5 + 6/8) + (4 + 4/15) - (2 + 6/10) = (5 + 4 -2) + (6/8 + 4/15 - 6/10)
Now just simplify that to get.
(5 + 4 -2) + (6/8 + 4/15 - 6/10) = 7 + 3/4 + 4/15 - 3/5
= 7 + 3/4 + 4/15 - 9/15
= 7 + 3/4 - 5/15
= 7 + 9/12 - 4/12
= 7 + 5/12
That is the answer.
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50 Points! Multiple choice algebra question. Photo attached. Thank you!
The margin of error is given as follows:
D) +- 6.7%.
What is a confidence interval of proportions?A confidence interval of proportions has the bounds given by the rule presented as follows:
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which the variables used to calculated these bounds are listed as follows:
[tex]\pi[/tex] is the sample proportion, which is also the estimate of the parameter.z is the critical value.n is the sample size.The confidence level is of 95%, hence the critical value z is the value of Z that has a p-value of [tex]\frac{1+0.95}{2} = 0.975[/tex], so the critical value is z = 1.96.
The margin of error is given as follows:
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
The parameters are given as follows:
[tex]n = 220, \pi = 0.38[/tex]
Hence the margin of error is given as follows:
[tex]M = 1.96\sqrt{\frac{0.38(0.62)}{220}}[/tex]
M = 0.067.
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What do we use to measure the area of a leaf?
Answer:
The area of a leaf is obtained by using a graph paper. A graph paper has small squares of area 1 mm 2 each. The area of the leaf will be equal to the number of squares it covers on the graph paper.
Step-by-step explanation:
the price of garri rose by 40 percent last week and also fell by 40 percent this week, what is the total rise or fall in percentage?
Mrs Tilmos creates a new Garden in her yard in the shape of a triangle. one side of the garden measures 13 ft and is perpendicular to a second side which is twice as long. before she plants her flowers, she wants to mic a fertilizer into the soil, whose D
directions say to use one cup per every 20 square feet? how many cups of fertilizer should she use? enter your answer as a decimal, rounded to the nearest half cup
Mrs. Tilmos should use 8 1/2 cups of fertilizer for her triangle garden.
To answer the question, we must first calculate the area of Mrs. Tilmos' triangle garden. We can do this using the equation for the area of a triangle (A=1/2 × b × h). In this equation, b is the base and h is the height.
For this garden, the base (b) is 13 feet and the height (h) is twice the base, so h=2 × b or h=26 feet. Using the equation, we can calculate that the area of the garden is:
A = 1/2 × b × h
A = 1/2 × 13 × 26
A = 169 square feet
Now that we have the area of the garden, we can calculate how many cups of fertilizer to use. We know that the fertilizer's directions say to use 1 cup per every 20 square feet, so we have to divide 169 by 20.
169 / 20 = 8.45
We can round this result up to 8 1/2 cups of fertilizer to use.
Therefore, Mrs. Tilmos should use 8 1/2 cups of fertilizer for her triangle garden.
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Please help me if you’re not sure please don’t answer
Step-by-step explanation:
7.4+8.59+9.66×3.14÷2=31.1562cm
You cut out a piece of fabric in the shape of a kite so that the congruent angles of the kite are each
100°. Of the remaining two angles, one is 4 times larger than the other. What is the measure of the
largest angle in the kite?
Answer:
Let x be the measure of the smaller angle.
The larger angle is 4x.
The sum of the angles in a kite is 360 degrees.
So, 100 + 100 + x + 4x = 360
6x = 160
x = 26.67
The larger angle is 4x = 106.67 degrees.
So the answer is 106.67
There are 40 students, 20 of them passed. If there are 100 student ,how many students will pass ?
Answer:
50 students will pass
Step-by-step explanation:
100÷40=2.5
20×2.5=50
or another way is 20 is half of 40 so half of 100 is 50
The table shows the mass of four packages. What is the total mass of the packages?
The total mass of the packages is 37.04 kg
What is the total mass of the packages?In math, mass means the amount an object weighs. To find the mass we use a balance or weights. The units used to denote mass are gram (g) and kilogram (kg).
Given that:
Masses (KG) are 3.94, 14.18, 11.27 and 7.65 (KG) for Package 1 to 4 respectively.
The total mass of the packages is:
= 3.94 + 14.18 + 11.27 + 7.65
= 37.04 kg
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Find the median and mode (in that order) for the amusement ticket orices in dollars. 35, 55, 38, 35, 37
Answer:
Step-by-step explanation:
median is 37 mode is 20
Suppose that the distance of a car travels varies directly with the amount of gasoline it uses. A certain car uses 19 gallons of gasoline to travel 570 miles. How many miles can the car travel if it has 29 gallons of gasoline?
Help due! A S A P
Answer:
870 miles
Step-by-step explanation:
You want to know the number of miles that a car can travel on 29 gallons of gas if it travels 570 miles on 19 gallons, and the miles are proportional to the gallons.
ProportionIncreasing the number of gallons by a factor of 29/19 will increase the number of miles by that same factor. The car will be able to travel ...
(29/19)(570) = 870 . . . . miles
The car can travel 870 miles if it has 29 gallons of gas.
__
Additional comment
We could do this solving the equation ...
(570 mi)/(19 gal) = (x mi)/(29 gal)
Multiplying by 29 gal gives ...
x = (29/19)(570) = 870 . . . . . as above
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Question 1 Find the slope of the line using the graph below. H -10 10 % Enter the slope as an integer or as a reduced fraction. If the slope is undefined typeundefined
The slope of the line is,
m = - 1
Given that;
Two points on the line are (0, 5) and (5, 0).
Now,
Since, The equation of line passes through the points ((0, 5) and (5, 0).
So, We need to find the slope of the line.
Hence, Slope of the line is,
m = (y₂ - y₁) / (x₂ - x₁)
m = (0 - 5) / (5 - 0)
m = - 5 / 5
m = - 1
Thus, The slope of the line is,
m = - 1
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{-1} x even times of times
The number which is the result of the exponential expression [tex](-1)^x[/tex], in which x is an even number, is given as follows:
1.
How to obtain the rule for the powers of -1?The exponential expression representing the power x of the base -1 is given as follows:
[tex](-1)^x[/tex].
There are two possible results, given as follows, depending if x is even or odd:
If x is an even number, the result of the expression is of 1.If x is an odd number, the result of the expression is of -1.For this problem, we have that the exponent x is an even number, hence the result is of 1.
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What is the radius of a sphere with a volume of 32398 cm 3 ,to the nearest tenth of a centimeter?
The radius of a sphere with a volume of [tex]32398 cm^ 3[/tex] ,to the nearest tenth of a centimeter is [tex]r=21.1cm[/tex]
How can the radius of a sphere be calculated?A sphere is a geometrical object that resembles a two-dimensional circle in three dimensions. A sphere is formally defined as a collection of points in three-dimensional space that are all located at the same distance, or r, from a given point.
The formula for the volume of a sphere is [tex]V = 4/3 \pi r^3[/tex]
V = volume
r = radius
Given [tex]32398 cm^ 3[/tex]
[tex]V = 4/3 \pi r^3[/tex]
[tex]32398 = 4/3 \pi r^3[/tex]
[tex]r^3 = \frac{ 32398 }{\frac{4\pi }{3} }[/tex]
[tex]r = \sqrt[3]{9393.931}[/tex]
[tex]r=21.1cm[/tex]
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reduce his entertainment percentage to be 12.5% of his total spending. He wants to add the money he will save in his entertainment spending into his grocery budget.
To reduce his entertainment percentage to 12.5% of his total spending and allocate the savings to his grocery budget, he needs to decrease his entertainment spending and increase his grocery budget accordingly.
To reduce the entertainment percentage to 12.5% of his total spending, the individual needs to make adjustments to his budget.
Calculate the current entertainment percentage:
Let's assume the individual's total spending is $X, and the current entertainment spending is $Y.
The current entertainment percentage can be calculated by dividing Y by X and multiplying by 100.
Current entertainment percentage [tex]= (Y / X) \times 100[/tex]
Determine the desired entertainment spending:
To reduce the entertainment percentage to 12.5%, we need to find the new entertainment spending amount.
Let's call it Z.
Desired entertainment spending [tex]= 0.125 \times X[/tex]
Calculate the amount to be saved:
The amount to be saved is the difference between the current entertainment spending (Y) and the desired entertainment spending (Z).
Amount to be saved = Y - Z
Add the saved amount to the grocery budget:
The individual wants to add the money saved from the entertainment budget to the grocery budget.
Let's call the current grocery budget G.
The new grocery budget (G') will be:
New grocery budget = G + Amount to be saved
By following these steps, the individual can reduce his entertainment percentage to 12.5% of his total spending and allocate the saved money to the grocery budget.
It's important to note that the specific dollar amounts will depend on the individual's current spending and budget.
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Max is designing a garden in his backyard. He is planning a
diagonal walkway through the garden. This diagram shows
the length & width of the planned garden. What is the length
of the diagonal walkway?
TRA
16 feet
12 feet
Applying the Pythagorean theorem, we can say that the length of the diagonal walkway that Max is designing is 20 feet.
How to calculate the length of the diagonal walkway?The first step is to understand that the design of the diagonal walkway forms a right triangle, so we can use the Pythagorean theorem, whose square of the length of the diagonal, also called the hypotenuse, will be equal to the sum of the squares on both sides.
Therefore, substituting the values in the formula C²=A²+B² where A corresponds to the width, B to the length and C as the diagonal, we have:
C²=12²+16²C²=144+256C²=400C= √400C= 20Find more about Pythagorean Theorem at:
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You spin the spinner once. 789 What is P(9)? Write your answer as a fraction or whole number.
Answer:
Since there is only one 9 on the spinner, the probability of spinning a 9 is 1/3.
P(9) = 1/3
What is the meaning of "ϕ(x, y, p)"?
The meaning of "ϕ(x, y, p)" depends on the context in which it is used. Without further information, it is difficult to determine the specific meaning of this expression. However, in mathematics and physics, the symbol "ϕ" often represents a function or a potential.
Symbol "ϕ": The symbol "ϕ" is a Greek letter called "phi" and is commonly used to represent various concepts in mathematics and physics. It is often used to denote a scalar function or a potential.
(x, y, p): The variables x, y, and p represent the independent variables or parameters of the function or potential ϕ. The specific interpretation of these variables depends on the context of the problem.
Function or Potential: In mathematics, a function ϕ(x, y, p) maps elements from the domain (x, y, p) to corresponding values in the range. The function can represent various mathematical relationships or operations.
In physics, the symbol "ϕ" often represents a potential, such as the electric potential or gravitational potential. In this case, ϕ(x, y, p) would represent the potential function that depends on the variables x, y, and p.
Further Context: To fully understand the meaning of "ϕ(x, y, p)", additional information about the specific field of study or problem is necessary. Different disciplines may assign different meanings to this expression.
In conclusion, without additional context, "ϕ(x, y, p)" represents a function or potential with variables x, y, and p. The specific interpretation and meaning of this expression depend on the field of study or problem at hand.
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In.a two - digit number, the units digit is twice the tens digit. If the number is doubled, it will be 12 more than the number reversed. Find the number
The number is 48.
Let's represent the two-digit number as 10x + y, where x is the tens digit and y is the units digit.
According to the given information, the units digit is twice the tens digit. So we have the equation:
y = 2x
If the number is doubled, it will be 12 more than the number reversed. When we double the number, we get 2(10x + y), and the number reversed is 10y + x.
Therefore, we can write the equation as:
2(10x + y) = 10y + x + 12
Simplifying this equation, we get:
20x + 2y = 10y + x + 12
19x = 8y + 12
19x - 8y = 12
We have two equations now:
y = 2x
19x - 8y = 12
Substituting the value of y from the first equation into the second equation, we get:
19x - 8(2x) = 12
19x - 16x = 12
3x = 12
x = 4
Now we can substitute the value of x back into the first equation to find y:
y = 2x
y = 2(4)
y = 8
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The average person sends about 25 e-mails a month. About how many e-mails is this each year?
Answer:
About 300 e-mails------------------
There are 12 months in a year.
Multiply 25 by the number of months to get the number of e-mails per year:
25*12 = 300Answer:
300
Step-by-step explanation:
To calculate the number of emails sent in a year based on an average of 25 emails per month, you simply multiply the average monthly emails by the number of months in a year.
Average emails per month: 25
Number of months in a year: 12
Therefore,
Emails per month × Months per year
25 × 12 = 300 emails per year
So, on average, a person would send about 300 emails in a year.
3. A phone company set the following rate schedule for an m-minute
call from any of its pay phones.
c(m) =
0.70 when m ≤ 6
0.70 + 0.24(m − 6) when m > 6 and m is an integer
0.70 + 0.24([m − 6] + 1) when m > 6 and m is not an integer
a. What is the cost of a call that is under six minutes?
b. What is the cost of a 14-minute call?
c. What is the cost of a 9 __
1
2
-minute call?
For a call that is under six minutes, the cost is $0.70, the cost of a 14-minute call is $2.62 and the cost of a 9-minute call is $1.90.
For a call that is under six minutes, the cost is $0.70.
This is because the rate schedule specifies that for m ≤ 6 minutes, the cost is a flat rate of $0.70.
For a 14-minute call, we can apply the second part of the rate schedule. Since 14 > 6 and 14 is an integer, the formula to calculate the cost becomes:
c(m) = 0.70 + 0.24(m - 6)
Plugging in m = 14:
c(14) = 0.70 + 0.24(14 - 6)
c(14) = 0.70 + 0.24(8)
c(14) = 0.70 + 1.92
c(14) = 2.62
Therefore, the cost of a 14-minute call is $2.62.
c. For a 9-minute call, we again apply the second part of the rate schedule. Since 9 > 6 and 9 is not an integer, the formula becomes:
c(m) = 0.70 + 0.24([m - 6] + 1)
Plugging in m = 9:
c(9) = 0.70 + 0.24([9 - 6] + 1)
c(9) = 0.70 + 0.24(4 + 1)
c(9) = 0.70 + 0.24(5)
c(9) = 0.70 + 1.20
c(9) = 1.90
Therefore, the cost of a 9-minute call is $1.90.
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In a town, 60% of the police officers have ride-alongs with teenagers who want to join the police force. 258 police officers have ride-alongs. How many police officers are there altogether?
Using the given percentage, we can see that there are a total of 430 police officers.
How many police officers are there altogether?If the total number of police officers is N, we know that 60% of that have a ride-along, and 258 police officers have a ride along, then we can write the equation:
258 = 0.6*N
Now we can solve that equation for N (to do so, just divide both sides of the equation by 0.6), we will get:
258/0.6 = N
430 = N
In this way, we can see that the total number of police officers is 430.
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Hi can you help me please
Answer:
C. 1000/x + 5000/(2x -10)
Step-by-step explanation:
You want the total time a climber spent when he climbed 1000 feet at x feet per hour, and 5000 more feet at (2x -10) feet per hour.
TimeThe relation between time, speed, and distance is ...
time = distance / speed
The total time is the sum of the times for the two distances.
First timeThe time for 1000 ft at x feet per hour is ...
time 1 = 1000/x
Second timeThe rate for the second part of the climb was 10 ft per hour less than twice the first rate, so was ...
2x -10
Then the time for 5000 ft at this rate is ...
time 2 = 5000/(2x -10)
Total timeThe total time spent climbing was ...
total = time 1 + time 2
total = 1000/x + 5000/(2x -10) . . . . . . matches choice C
__
Additional comment
The relation between speed, time, and distance is usually seen as ...
speed = miles per hour
As a fraction, this is ...
speed = distance / time
Above, we rearranged this to ...
time = distance / speed
It's just another form of the relationship ...
distance = speed × time
<95141404393>
A champion bicyclist training in a flat, open area
could ride at 3 times the speed of the wind if the
wind were absent. On this particular day, she
traveled 30 miles against the wind in 2 more hours
than it took to go 40 miles with the wind on the
return trip. What is the speed of the bike in no
wind?
The solution is:
The average speed of bicyclist is 120 miles per hours
The speed of wind is 30 miles per hours .
Here, we have,
Given as :
The distance that bicyclist cover = d = 30 miles
The time taken by bicyclist to cover 30 miles = t = 5 hours
Let the average speed of bicyclist = x miles per hours
Let The speed of wind = y miles per hours
Now, biking into wind
The time taken in return by bicyclist = 5 hours
∵ Speed = Distance × time
i.e x + y = d × t
∴ x + y = 30 miles × 5 hours
Or, x + y = 150 mi/h ...........A
Again
Now, biking against wind
The time taken in return by bicyclist = 3 hours
∵ Speed = Distance × time
i.e x - y = d × t
∴ x - y = 30 miles × 3 hours
Or, x - y = 90 mi/h ......B
Solving equation A and B
(x + y) + (x - y) = 150 mi/h + 90 mi/h
Or, (x + x) + (y - y) = 240 mi/h
Or, 2 x + 0 = 240 mi/h
∴ x = 240/2
i.e. x = 120 mi/h
So, The average speed of bicyclist = x = 120 miles per hours
Now, Put the value of x into eq B
∵ x - y = 90 mi/h
Or, 120 mi/h - y = 90 mi/h
∴ y = 120 mi/h - 90 mi/h
I.e. y = 30 mi/h
So, The speed of wind = y = 30 miles per hours
Hence, The average speed of bicyclist is 120 miles per hours
And The speed of wind is 30 miles per hours .
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complete question:
Biking into the wind on a flat path, a bicyclist takes 5 hours to travel 30 miles. The return bike takes 3 hours. The wind speed remains constant during the trip. What is the bicyclist's average speed in the air? What is the speed of the wind?