Please help me on Mathematics
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Answers
Answer:
1. 20 km/hr (60km / 3h)
2. 70 m/hr (170m / 2h)
3. 6.5 hr (260cm / 40km)
4. 4.5 s (72cm / 16cm)
5. 184 km (46km * 4h)
Step-by-step explanation:
We'll use d = distance, t = time, s = speed.
Speed over time can be found by dividing distance by time
s = d / t
We can take this formula and manipulate it to find either distance or time if we know two of the values. Keeping in mind division and multiplication cancel each other.
If we wanted to find d for instance we can multiply both sides by t to get
s * t = d
For time we can divide both sides of the above formula by s to get
t = d / s
Answer:
1. 20 km/h
2. 70 m/h
3. 6.5 h
4. 4.5 s
5. 184 km
Step-by-step explanation:
For first two questions, you can use the following formula:
[tex]\displaystyle \large{s = \frac{d}{t}}[/tex]
I denote ‘s’ be speed, ‘d’ be distance and ‘t’ be time. Some books may use ‘v’ for speed instead of ‘s’ but I use ‘s’ variable instead so it makes the equation easier to memorize.
Therefore, speed = distance/time
( 1 ) The first question is given both distance be 60 km and time be 3 hours. Therefore:
[tex]\displaystyle \large{s=\frac{60}{3}}\\\displaystyle \large{s=20 \ \ \sf{km / h}}[/tex]
So for the first question, the speed is 20 km/h
( 2 ) The second is given both distance be 140 m and time be 2 hours. Therefore:
[tex]\displaystyle \large{s=\frac{140}{2}}\\\displaystyle \large{s=70 \ \ \sf{m / h}}[/tex]
Therefore, speed is 70 m/h
For the third and four questions, we will be finding time. From the speed formula:
[tex]\displaystyle \large{s=\frac{d}{t}}[/tex]
Multiply both sides by t.
[tex]\displaystyle \large{st=d}[/tex]
Divide both sides by s.
[tex]\displaystyle \large{t=\frac{d}{s}}[/tex]
Therefore, time = distance/speed
( 3 ) The question is given speed be 40 km/h and distance be 260 km. Therefore:
[tex]\displaystyle \large{t=\frac{260}{40}}\\\displaystyle \large{t=\frac{13}{2} \ \ \sf{h}}\\\displaystyle \large{t = 6\frac{1}{2} \ \ \sf{h}}\\\displaystyle \large{t= 6.5 \ \ \sf{h}}[/tex]
Therefore, time is 6.5 h
( 4 ) The question is given speed be 16 cm/s and distance be 72 cm. Therefore:
[tex]\displaystyle \large{t=\frac{72}{16}}\\\displaystyle \large{t=\frac{9}{2} \ \ \sf{s}}\\\displaystyle \large{t=4\frac{1}{2} \ \ \sf{s}}\\\displaystyle \large{t=4.5 \ \ \sf{s}}[/tex]
Therefore, time is 4.5 s
For the last question, we have to find distance. From the speed formula:
[tex]\displaystyle \large{s=\frac{d}{t}}[/tex]
Multiply both sides by t.
[tex]\displaystyle \large{st=d}\\\displaystyle \large{d=st}[/tex]
Therefore, distance = speed * time
( 5 ) The question is given time be 4 hours and speed be 46 km/h. Therefore:
[tex]\displaystyle \large{d=46 \cdot 4}\\\displaystyle \large{ d=184 \ \ \sf{km}}[/tex]
Therefore, distance is 184 km.
Related Questions
HELPPPP URGENT!!!!!
Use the equation to find the values of f and t (5f + 20t =305)
Answers
Answer:
F= -4t+61
T= -1/4f + 61/4
The blue dot is at what value on the number line?
Answers
Answer:
i believe the blue dot is -28
Fill in the blanks below to complete
the rules for even and odd numbers.
1. Even + Even =
Show an example to prove your answer.
2. Odd + Odd =
Show an example to prove your answer.
3. Even + Odd =
Show an example to prove your answer.
Answers
Step-by-step explanation:
1) Even + Even = Even
example : 26 + 22 = 48
2) Odd + Odd = Even
example : 11 + 13 = 24
3) Even + Odd = Odd
example : 43 + 2 = 45
Circumference of the circle
Answers
Answer:
r=14/2
r=7
[tex]circumference = 2\pi {r}\\ = 2 \times \frac{22}{7} \times 7 \\ = 44[/tex]
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
Let's find the circumference of given circle ~
Circumference :
[tex] \qquad \tt \dashrightarrow \: \pi{d}^{} [/tex]
where, d = diameter
Now, let's calculate it ~
[tex] \qquad \tt \dashrightarrow \: c = 14\pi{}^{} [/tex]
That's the answer I terms of π, but we can also plug in the approximate value of pi as 3.14
[tex] \qquad \tt \dashrightarrow \: c = 14 \times 3.14{}^{} [/tex]
[tex] \qquad \tt \dashrightarrow \: c = 43.96 \: \: m[/tex]
[tex] \qquad \tt \dashrightarrow \: c \approx 44 \: \: m[/tex]
i need help asap
if F(4)=9, the corresponding ordered pair is what
Answers
Answer:
F(5)=11.25
Step-by-step explanation:
I'm like 80% sure this is right, and I hope it helps.
First I did 9/4 which equals 2.25. and that would be F(1)
then added 2.25 to 9 which equals 11.25
multiplying 2.25 by 5 would also equal 11.25.
I did 5 because, on a number line, 5 comes after 4.
Joan borrowed $5 a day to buy lunch. She now owes $65 dollars. How many days did Joan borrow $5? Use a picture to help explain your answer. Compare the picture to the numerical expression.
Answers
65/5=13
i’m not if my “drawing works though”
Emiyjah wants to buy a new smartphone that costs $495. She has already saved $75.
6A) Write an inequality that shows the amount of money, m, that Emiyjah still needs to save before she can buy the smartphone.
Make sure you include the 495, the 75, the m, and an inequality symbol NOT an equal sign!
Answers
(−10,7)∪(7,11)(−1,2)∪(−4,0)[−1,9)∪(2,10]
Step-by-step explanation:
420 is that Marco still needs to save before he can buy the smartphone.
Answer:
m + 75 > 495
Step-by-step explanation:
After saving an additional amount m, Emiyjah will have a total savings of ...
m + 75
She needs to have that amount be greater than the cost of the smartphone, so she requires ...
m +75 > 495
__
Additional comment
The solution to this inequality is m > 420.
Using Coordinates in Proofs |
IS
What is the most specific name for the figure?
A(a,0)
B(0, b)
Cla, 2b)
D(2a, b)
B
D
А
B. Rectangle
A. Trapezoid
D. Rhombus
C. Square
Please help me!
Answers
Answer: D
Step-by-step explanation: You're Welcome
need help really please someone
Answers
Answer:
6/8 and 12/16
Step-by-step explanation:
This is because 3/4 x 2/2 = 6/8 and 3/4 x 4/4 = 12/16
Answer:
6/8 and 9/12 are both equal to 3/4
Step-by-step explanation:
You can't simplify but you can make it bigger.
3/4 x 2/2 = 6/8
and
3/4 x 3/3 = 9/12
it should be correct because 3/3 and 2/2 are both equal to 1 which is why they are equivalent.
Simplify the expression. 20 • 5–2
a) 25
b) –500
c) –200
d) 4/5
Answers
Answer: D) 4/5
Hope this helps :)
Suppose that 22% of people own dogs. If you pick two people at random, what is the probability that they both own a dog? Round to 2 places.
Answers
Which expression has a simplifled expression of 5x - 12?
-3(4 x - 4) - 7 x
3(4 x-4) - 7 x
31-4x + 4) - 7 x
-31-4 x - 4) - 7 x
Answers
Answer:
The correct answer is A
Step-by-step explanation:
When you simplify it it's A
whoever anwsers first will get the brainliest (only if you anwser first)!
Answers
Answer:
The answer is A. (Pls brainliest!!)
Step-by-step explanation:
Answer:
All of them
Step-by-step explanation:
To find the volume of a rectangular prism the formula is V=whl . So to find the dimensions of the box we would have to take the options that they give us and see which ones equal 80 cubic cm.
2⋅5⋅8=80, so right away we know the answer because 5⋅2=10 and 10⋅8=80
4⋅5⋅4=80, that is another possible answer because 5⋅4=20 and 20⋅4=80
10⋅4⋅2=80, yet another answer that is equivalent to 80 because 10⋅4=40 and 40⋅2= 80
So now we know that all three answers are correct and they would all work as possible dimensions for Max’s box.
Hope this helps!!
the graph of a line gets _____
as the value of the slope gets bigger.
A. steeper
B. longer
C. less steep
D. shorter
Answers
Answer: Less Steep
Step-by-step explanation: the graph of a line gets less steep as the value of the slope gets bigger.
The graph of the line gets steeper as the value of the slope gets bigger. Then the correct option is A.
What is a linear equation?A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.
The linear equation is given as,
y = mx + c
Where m is the slope of the line and c is the y-intercept of the line.
If the value of the slope is bigger then the line will be steeper.
Thus, the correct option is A.
More about the linear equation link is given below.
https://brainly.com/question/11897796
#SPJ7
HELPP!!
For which value of h will the equation below
result in an infinite number of solutions?
(3x - 8)h = -27x + 72
Answers
Answer:
h = -9
Step-by-step explanation:
Try to make the left hand side and the right hand side equal. By dividing like
h = (-27x+72)/(3x-8)
= [-9(3x-8)]/(3x-8)
= -9
When both sides are equal, you can't find the value of x as there are infinitely many solutions of x.
__________ is a time to challenge yourself and take some risks since your body is stronger than ever before, and you are changing and developing in all sorts of wonderful ways.
Answers
Answer:
Adolescence
Step-by-step explanation:
We are constantly changing and developing in adolescence, it is the bridge between childhood and adulthood, mixed with youth (taking risks more frequently, less worries) and responsibilities and coming-of-age.
Find the distance between the two points in simplest radical form.
(3,9) and (-2,4)
Answers
Here we would be using distance formula to calculate the distance between those two points.
★ Points are,
(3 , 9)(-2 , 4)★ Distance Formula :
[tex]\huge \large \boxed{\sf{{d \: = \: \sqrt{(x _{2} - x _{1}) {}^{2} \: + \: (y _{2} - y _{1}) {}^{2} }}}} \: \red\bigstar[/tex]★ We have :
x1 = 3
x2 = -2
y1 = 9
y2 = 4
★ Substituting the values :
Refer the attachment.Additional Information :Centroid of a triangle :-
[tex]\boxed{ \sf{Centroid \: = \: \dfrac{x_1 \: + \: x_2 \: + \: x_3}{3} }} \: \pink\bigstar[/tex]Midpoint of two points:-
[tex]\boxed{ \sf{M \: = \: \dfrac{x_1 \: + \: x_2 }{2} \: , \: \dfrac{y_1 \: + \: y_2 }{2}}} \: \pink\bigstar[/tex]Which expression is equivalent to (2x + 7x*) - (5x² - 4x)?
A
–3x²+11
B
–3x²+3
2x + 11x3 - 5x2
2x5 - 3x) - 5x
Answers
Answer:
5x^2 + 13x
Step-by-step explanation:
simplify the expression c^-6d^4/c^-16d^14
a)c^2d^2
b)c^10/d^10
c)c^10d^10
d)d^-2/d^-2
Answers
Answer:
The answer is:
B. c¹⁰/d¹⁰
Find the length of the midsegment of the trapezoid.
Answers
Answer: 14
Step-by-step explanation:
Emma buys a game for $26.84. She gives
the clerk $30.00. List Emma's change using the least
number of coins and bills.
Answers
Answer:
3 1-dollar-bills. 1 dime. 1 nickel. 1 penny
$3.16 in return.
ABC is circumscribed about H, with the points of tangency D,E, and F.
Answers
Name all the common multiples of 3 and 8 that are less than 50
Answers
i don’t know 8’s multiples so, i thought i’d provide at least 3’s multiples :) i hope you have a lovely rest of your day!
I need help please give explanation as well thank you
Answers
Joel wants to fence off a triangular portion of his yard for his chickens. The three pieces of fencing he has measure 8 feet, 15 feet, and 20 feet long. Use this information to answer 8-9
8. Joel cut the longest piece of fencing in order to make a right triangle. Find the perimeter of Joel’s fence.
9. If it takes Joel 30 seconds to
foot of fencing, how many total minutes will it take him to install the fence?
Please help me thank you so much.
Answers
Answer:
8. Joel will not form a right triangle.
9.20 minutes
Step-by-step explanation:
8. First use theorem
Right triangle theorem
c²=a²+b²
c=20 ft
a=8ft
b=15 ft
20² =8²+15²
simplify
400= 64+225
400 does not = 289
9.
Part B)
if Joel cut the longest piece of fencing in order to make a right triangle
longest part is 17^2
a²+b²=289
c²=√289
c=17 ft
the perimeter of the fence is
a+b+c
17+8+15
perimeter is
40 ft
30 sec to install 40 ft(perimeter)
x=40*30
x=1200 seconds
x=1200/60 in minutes
x=20 minutes
20 Points
The length of the shorter leg of a 30-60-90 Special Right Triangle is 6 cm long. How long is the hypotenuse of the triangle?
Question 2 options:
63–√ cm
6 cm
12 cm
62–√ cm
Answers
Answer:
The answer is 12 cm.
Step-by-step explanation:
Verified by correct test results.
The length of the hypotenuse of the given right triangle would be 12cm.
What is a triangle?A triangle is a two - dimensional figure with three sides and three angles.The sum of the angles of the triangle is equal to 180 degrees.∠A + ∠B + ∠C = 180°Given is that the length of the shorter leg of a 30-60-90 Special Right Triangle is 6 cm long.
The base length is the shortest distance of the right - angled triangle. We can find the hypotenuse using the cosine function as -
cos(60) = b/h
h ={b/cos(60)}
h = 6/(1/2)
h = 6 x 2
h = 12 cm
Therefore, the length of the hypotenuse of the given right triangle would be 12cm.
To solve more questions on triangles, visit the link-
https://brainly.com/question/2773823
#SPJ3
From the given figure, find the value of x:-
Please can someone answer it I need it...
I'll mark as BRAINLIEST...
Answers
Answer:
90°
Step-by-step explanation:
Angle subtended by diameter from circumference is a right angle(Circle Theorem)
Area of each triangle
Answers
Answer:
I only know the answer to second triangle only
As area is equal to half base * alltitude
So put the value in the formula
We get
24
Step-by-step explanation:
PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT PLEASE
What is the amplitude of the function?
Answers
Answer:
2
Step-by-step explanation:
Take the absolute value of the lowest y value.
So
[tex] | - 1| = 1[/tex]
Take the absolute value of highest y value.
[tex] |3| = 3[/tex]
Add those two together and divide by two.
[tex] \frac{1 + 3}{2} = 2[/tex]
So the amplitude is 2
1. Ms. Rowel would like to buy a house costing $190000. She is required to make a down payment equal
to 10% of the value of the house then borrow the balance from a bank that charges interest at an annual
rate of 4.2% compounded monthly. The bank loan has to be paid o§ with equal monthly payments,
(paid at the end of each month), in 30 years. Assume that she will get the loan at the beginning of a
month and start making monthly payments on the last day of each month until the loan is paid o§
Answers
Answer:
the monthly payment would be 836.22
Step-by-step explanation:
you would find the loan amount which is 190,000 -10% of 190,000 which is 190,000 - 19,000=171,000
then you put the numbers in on a calculator which im using a spreadsheets/ excel
you need to make sure that you divide 12 for the interest and multiply 12 to the 30 years to get the monthly value of them