find x and y
7x+y=17
-9x-y=-21

Answer:

The answer should be 6.6 and -12.4. The first and last one. I wish you the best of luck!

Step-by-step explanation:

Answer:

36 adult and 94 student tickets

Step-by-step explanation:

x = adult ticket              y = student ticket

5x + 3y = 462

x + y = 130

x + y = 130

y = 130 - x

5x + 3y = 462

5x + 3(130 - x) = 462

5x + 390 - 3x = 462

2x + 390 = 462

2x = 72

x = 36

x + y = 130

36 + y = 130

y = 94

Total area of the roof top garden is 272 ft² .

Rooftop planters can have soil depths ranging from six inches at the very least, to allow for little groundcovers and shrubs, to three to four feet, which is necessary for huge shade and coniferous trees. Divide the length by the width of a rectangle or square to find its area.

The square footage of the area is calculated by multiplying the length and width. Please maintain the same unit size (feet or inches). For a rectangular garden area, multiply the length by the width to get the square footage. A suitable garden is often one that is roughly 10 feet by 10 feet, if your landscape permits it (3 x 3 meters).

Given, the figure comprises of triangle and rectangle,

Area of rectangle = length × breadth

= 12 ft × 20 ft

= 240 ft²

Area of triangle = 1/2 × base × height

= 1/2 × 8 × (20 - 12)

= 1/2 × 8 × 8

= 32 ft²

Total area of the figure = Area of rectangle + Area of triangle

= 240 + 32

= 272 ft²

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The value of 223,692 divided by 42 using the standard algorithm and showing work is 5326.

The value of 223,692 divided by 42 using the standard algorithm and showing work is given below:

Dividing the two values by 2, a common factor

223,692 / 42 = 111,846 / 21

Dividing the two values by 3, a common factor

111,846 / 21 = 37282 / 7

Dividing the two values by 7, a common factor

37282 / 7 = 5326 / 1

Hence, the value of the division is 5326.

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20 litres of regular milk must be mixed with 90 l of milk with 1% butterfat to have milk with 2% butterfat.

From the data given,

Let us assume that the x litres of regular milk which have 4% butterfat is mixed.

The amount of butterfat in 40 L of milk with 1% butterfat will be = (40*.01)=0.4 L

The amount of butterfat in x L of milk with 4% butterfat will be =x *0.04=0.04 x

The amount of butterfat in (40+x) L  (when both are mixed) of milk with 2% butterfat will be =(40+x)*(0.02)=0.02(40+x)

Since we are aware that the total quantity of butterfat in each type's individual milk will match the total amount of butterfat in the final milk.

Therefore we can set up the equation which will be like this:

0.4+0.04 x=0.02(40+x)

Now solving the above equation for getting the value of "x"

0.4+0.04 x=0.02(40+x)

=>0.4+0.04x=0.8+0.02x

=>0.04x-0.02x=0.8-0.4

=>0.02x=0.4

=>x=(0.4/0.02)=20

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To make milk with 2% butterfat, 20 liters of ordinary milk must be combined with 90 liters of 1% butterfat milk.

Assume that 4% butterfat normal milk in an amount of X litres is combined. 40 L of milk with 1% butterfat will contain (40 x 0.01)=0.4 L of butterfat. In X L of milk containing 4% butterfat, the amount of butterfat is equal to =(X liter) x (0.04)=0.04 X.

When both are combined, (40+X) L of milk with 2% butterfat will contain =(40+X)*(0.02)

=0.02(40+X) grams of butterfat.

We know that the overall amount of butterfat in each type's individual milk will be the same as the total amount of butterfat in the finished milk.

As a result, we may construct the equation, which looks like this:

0.4+0.04X = 0.02(40+X)

To find the value of "X," solve the equation above.

0.4+0.04 X=0.02(40+X)

= 0.4+0.04X=0.8+0.02X

= 0.04X-0.02X=0.8-0.4

= 0.02X=0.4

= X=(0.4/0.02)

=  20

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According to the following Venn diagram, the number students surveyed is 2063

The term Venn diagram in math is defined as overlapping circles or other shapes to illustrate the logical relationships between two or more sets of items

Here we have given that anonymous survey of college students was taken to determine behaviors regarding​ alcohol, cigarettes, and illegal drugs.

While we looking into the Venn diagram we have identified that 875 drank alcohol​ regularly, 665 smoked​ cigarettes, 207 used illegal​ drugs, 422drank alcohol regularly and smoked​ cigarettes, 113 drank alcohol regularly and used illegal​ drugs,126 smoked cigarettes and used illegal​ drugs, 97 engaged in all three​ behaviors, and 217 engaged in none of these behaviors.

Then the number of students is calculated as,

=> 875 + 667 + 207 + 97 + 217

=> 2063

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a) If it snows today, I will ski tomorrow.

Converse: If I ski tomorrow, it snows today.

Contrapositive: If I don't ski tomorrow, it doesn't snow today.

Inverse: If it doesn't snow today, I won't ski tomorrow.

b) I come to class whenever there is going to be a quiz.

Converse: Whenever I come to class, there is going to be a quiz.

Contrapositive: Whenever I don't come to class, there isn't going to be a quiz.

Inverse: Whenever there isn't going to be a quiz, I don't come to class.

c) A positive integer is a prime only if it has no divisors other than 1 and itself.

Converse: If a positive integer has no divisors other than 1 and itself, then it is a prime.

Contrapositive: If a positive integer is not a prime, it has divisors other than 1 and itself.

Inverse: If a positive integer has divisors other than 1 and itself, it is not a prime.

A mathematical conditional statement is a statement that presents a relationship between two statements, where one statement (the "condition") is only true if the other statement (the "conclusion") is also true.

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what do you want help with?

Answer: The wall that Randy is painting is 20 feet long and 6 feet high. The two corners that he is not painting are triangular in shape and are each 6 feet high and 4 feet wide.

So the area of the wall that Randy is going to paint is:

20 ft * 6 ft = 120 sq ft

The area of the two corners that Randy is not painting is:

(1/2) * 4 ft * 6 ft = 12 sq ft

Therefore, the total area that Randy needs to paint is:

120 sq ft - 12 sq ft = 108 sq ft

One gallon of paint will cover 100 square feet.

So Randy will need to purchase 108 sq ft / 100 sq ft/gallon = 1.08 gallons of paint.

Randy will have to purchase 1.08 gallons of paint.

Step-by-step explanation:

All parts of the problem given have been explained and provided below.

Variables in any particular dataset are defined as any characteristics, numbers, or quantity that can be measured or counted to give information about any object, on which the dataset is based.

So, the variables in this given dataset are;

Overall score

Recommended

owner satisfaction

Overall miles per gallon

Acceleration (0-60) sec

Categorical or qualitative variables are those which can't be quantified or measured. Their values are defined by an order relation between the different categories.

the categorical variables in this dataset are,

Recommended

Owner satisfaction

Quantitative variables are those which can be measured in an order to provide information about an object.

the quantitative variables in this dataset are,

Overall score

Overall miles per gallon

Acceleration (0-60) sec

In the given dataset, 7 vehicles are recommended,

So their percentage would be,

7/15 × 100 = 46.67%

The average overall miles per gallon of these 15 vehicles is 25.4.

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Answer: 10 magdalenas

espero que esto ayude

For the graphed function we have:

The domain

D: {-3, -2, -1, 0, 1, 2}

And the range

R: {0.25, 0.5, 1, 2, 4, 8}

For a function y = f(x), we define the domain as the set of possible inputs and the range as the set of possible outputs.

Remember that the notation in point form is (input, output).

Now, the graphed points are:

(-3, 8), (-2, 4), (-1, 2), (0, 1), (1, 0.5), (2, 0.25)

The domain is the set of the first values:

D: {-3, -2, -1, 0, 1, 2}

And the range is the set of the second values:

R: {0.25, 0.5, 1, 2, 4, 8}

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The solution to the absolute value equation |6x – 4| = 6 is 6x - 4 = 6 and 6x - 4 = -6

An equation is an expression that shows the relationship between numbers and variables.

The absolute value of a real number x is the non-negative value of x without regard to its sign.

Given the absolute value equation:

|6x - 4| = 6

Therefore, the absolute equation can be represented by:

6x - 4 = 6 and -(6x - 4) = 6

Simplifying:

6x - 4 = 6 and 6x - 4 = -6

adding like terms:

6x = 10 and 6x = -2

x = 5/3 and x = -2/3

The solution to |6x – 4| = 6 is x = 5/3 and x = -2/3

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so we have hmmm 4 sets above, hmm let's check say the second set, the triangle with sides 5, 9, 3.  Check the picture below.

we have three sides, let's look at the two smaller sides first, 5 and 3.

if we move the sides closer and ever closer to each other, to the extent that one is right on top of the other, what is the length of the red side?  Well, assuming the two smaller sides are one pancaked on top of the other, the red side will be as long as 5 - 3 = 2.  However, the sides can't be on top of each other, because if that's so, we have a flat-line, and thus we wouldn't have a triangle.  So whatever the third side may be, it must be greater than 2.

Now, if we move the sides away from each other, farther and farther to the extent that one is parallel to the other, then the third side will just be as long as 3 + 5 = 8.  However, we can't do that, because if that were to happen, we again will have a flat-line and not a triangle.  So whatever the third side may be, it must be less than 8.

so for those reasons the third side can't be 9, it won't work for a triangle, even 8 is not good, so it must be less.

Now, if we look at the 1st set and 4th set, we end up with the same dilemma, the longest side is too long.

If we take a looksie at the 3rd set however with small sides of 6 and 7, it gives us a third side that must be more than 1 but less than 13, so 7 fits just nicely, so that one works.

The area of the shaded region is 251 m^2.

the solution is attached with this,

parallelograms

A parallelogram is a two-dimensional geometrical shape whose sides are parallel to each other.

The Sum of adjacent angles of a parallelogram is equal to 180 degrees.

It is a type of polygon having four sides, where the pair of parallel sides are equal in length.

polygon

A polygon can be defined as a flat or plane, two-dimensional closed shape bounded with straight sides. It does not have curved sides. The sides of a polygon are also called its edges.

The points where two sides meet are the vertices of a polygon.

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Check the picture below.

so the rectangle's perimeter is pretty much just 4 + 6 + 6 = 16, now let's notice the semi-circle, is really just half of a circle whose diameter is 4, meaning that its radius is 2, so let's simply get the circumference of that semi-circle and add it to 16.

[tex]\textit{circumference of a semi-circle}\\\\ C=\cfrac{1}{2}\cdot 2\pi r \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=2 \end{cases}\implies C=\cfrac{1}{2}\cdot 2\pi (2)\implies C=2\pi \\\\[-0.35em] ~\dotfill\\\\ \stackrel{Perimeter}{16~~ + ~~2\pi} ~~ \approx ~~ \text{\LARGE 22.3}[/tex]

Based on the analysis, we can be conclude that (C) Driving behavior and gender are related.

The link between variables is described by correlation. It can be viewed positively or negatively, as well as strong or weak. A correlation does not prove a cause. When the variable on the x-axis rises as the variable on the y-axis rises, there is a positive linear association. An upward-sloping straight regression line illustrates this.

When one variable rises while the other falls, there is a negative linear correlation. A straight regression line with a falling slope illustrates this. When there is a relationship between variables, but the relationship is not linear, there is a non-linear correlation (straight).

Hence, according to correlation theory, Driving behavior and gender are related.

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The cowpox infection will prevent the child from being infected by the small pox virus.

Hypothes is a tentative assumption made in order to draw out and test its logical or empirical consequences

A simple hypothesis suggests only the relationship between two variables: one independent and one dependent. Examples: If you stay up late, then you feel tired the next day. Turning off your phone makes it charge faster.

Given paragraph is "dr. edward jenner realized that cows have a disease called cowpox, which is like a disease that infects humans called smallpox; jenner noticed that milkmaids whose hands were infected with cowpox were not contracting smallpox. jenner infected a child with the pus from a cowpox blister, and found that the child did not contract smallpox."

In this supporting hypothesis is "The cowpox infection will prevent the child from being infected by the small pox virus."

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Answer: I believe it's 30 vehicles

Step-by-step explanation:

If you divided by 40 you get 30. There's for 4 rows of 10 which is 40 so you would divide, I think? I hope this helps! Been so long since I did this math.

The range of the length is 3.2 meters to 3.34 meters

From the question, we have the following parameters that can be used in our computation:

Length of pipe = 3.27 meters

Relative error = 0.07 meters

Represent the range with x

So, we have

|x - Length| = Relative error

substitute the known values in the above equation, so, we have the following representation

|x - 3.27| = 0.07

Remove the bracket

x - 3.27 = 0.07 or x - 3.27 = -0.07

Evaluate

x = 3.2 or x = 3.34

Hence, the range is 3.2 meters to 3.34 meters

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The shape and size remains the same represents the correct alternative.

Given is that a figure is rotated 180 degrees clockwise about the origin.

When a coordinate (x, y) is rotated by 180 degrees clockwise about the origin, the new coordinates become ( - x, - y). But only the coordinates change, the shape and size remains the same.

Therefore, the shape and size remains the same represents the correct alternative.

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The two positive coterminal angles are 180° and 540°, the two negative ones are -900° and -180°.

For any given angle A, the family of coterminal angles can be written as:

B = A + n*360°

Where n can be any integer number.

Here we want to find angles coterminal to -540°, so we have the relation:

B = -540° + n*360°

if n = -1 we get:

B = -540° - 1*360° = -900°

if n = 1

B = -540° + 1*360° = -180°

if n = 2

B = -540° + 2*360° = 180°

if n = 3

B =  -540° + 3*360° = 540°

These are the 4 coterminal angles on the given range.

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For the scenario, the null and alternate hypotheses are as follows:

H(0) : p = 0.75

H(a) : p ≠ 0.75

In the question, a hospital director believes that 75% of the lab reports contain errors.

A sample of 140 reports found 98 errors.

We have to explain there is sufficient evidence at the 0.10 level to refute the hospital director's claim or not and we have to state the null and alternative hypotheses for the above scenario.

In statistics, a two-tailed test is a procedure that determines if a sample is larger than or less than a particular range of values by using a two-sided critical area of a distribution. It is utilized in tests for statistical significance and null hypotheses.

So this is a two tailed test.

The null and alternative hypotheses for the above scenario is:

H(0) : p = 0.75

H(a) : p ≠ 0.75

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Answer:

a

Step-by-step explanation:

as u pit it in the mirrror and u can see

11 is a 35.3% decrease of 17.

17 - 11/((17 + 11)/2) = 6/14 = 0.42857142857143 = 42.857142857143%

The inequality expression has no solution for a

From the question, we have the following parameters that can be used in our computation:

a > a + 4

Subtract the variable a from both sides of the equation

So, we have the following representation

a - a > a + 4 - a

Evaluate the difference

This gives

0 > 4

The above expression is false

hence, the inequality has no solution

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The sum of the fraction given for the sum of 7/8 and 1/4 will be 1 1/8.

A fraction simply means a piece of a whole. In this situation, the number is represented as a quotient such that the numerator and denominator are split. In this situation, in a simple fraction, the numerator as well as the denominator are both integers.

It should be noted that the sum of 7/8 and 1/4 will be:

= 7/8 + 1/4

= 7/8 + 2/8

= 9/8

= 1 1/8

Therefore, the sum is 1 1/8.

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Complete question

7/8 + 1/4. Find the sum.

The number of years from 2020 to 2050 will be 30 years. Then the average temperature in 2050 will be - 15.25 °F.

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.

In 2020, the normal temperature in certain pieces of the Artic was about - 19.3F. The temperature in the cold expanded around 0.135 degrees each year somewhat recently.

Let 'x' be the number of years and 'y' be the temperature. Then the equation is given as,

y = 0.135x - 19.3

The number of years from 2020 to 2050 will be given as,

x = 2050 - 2020

x = 30

Then the average temperature in 2050 will be given as,

y = 0.135(30) - 19.3

y = 4.05 - 19.3

y = - 15.25F

The number of years from 2020 to 2050 will be 30 years. Then the average temperature in 2050 will be - 15.25 °F.

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