plz help its 7th grade math
16 donuts cost $15.75. What is the price per donut? Round to the nearest cent.

Answer:

-22.5

Step-by-step explanation:

-15- |-7.5|

after taking the absolute value off, -7.5 would become positive 7.5. But then the negative outside the absolute value makes it negative again.

-15-7.5

=-22.5

The simplified expression -15 - |-7.5| is equal to -22.5.

To simplify the expression -15 - |-7.5|, we'll follow these steps:

Evaluate the absolute value: |-7.5|.

The absolute value of a number is its distance from zero on the number line. In this case, |-7.5| is equal to 7.5 because 7.5 units away from zero.

Substitute the absolute value into the expression:

-15 - 7.5.

Perform the subtraction:

-15 - 7.5 = -22.5.

Therefore, the simplified expression -15 - |-7.5| is equal to -22.5.

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Answer:

b

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

64 coins are not nickels and the equation used to find 'n' is 87 - (27 + 13 + 24) = n

Answer:

y= 2/5x +1

or 5x-2y=5

Step-by-step explanation:

Answer: 128 cm

Step-by-step explanation: 96+24+8=128cm

Answer: Ratios form a proportion if they are equal when cross-multiplied.

1/4 and 3/12

Cross-multiply these ratios to compare them: 1/4 * 12 = 3, 3/12 * 4 = 3.

So they are equal and form a proportion.

54/10; 81/15

Cross-multiply these ratios to compare them: 54/10 * 15 = 81, 81/15 * 10 = 54.

So they are equal and form a proportion.

18/24; 15/20

Cross-multiply these ratios to compare them: 18/24 * 20 = 15, 15/20 * 24 = 18.

So they are equal and form a proportion.

Hence, all the ratios mentioned above form a proportion.

Step-by-step explanation:

Answer:

A. Max is ten miles from home after three miles.

B. Ali started a nine miles away from home.

C.Ali spent 3 hours in the same place.

D. Max spent 9 hours in the same place.

Step-by-step explanation:

Sorry I didn't answer all of them, these were the only ones I knew.

B:Top Plot

Step-by-step explanation:

It makes more sense since the bar is in a higher position such

Answer:

a= 1 b= 7

Step-by-step explanation:

X^2y12/ xy^5

= x^2–1 • y^12–5

= xy^7

Answer:

\(xy^7=x^ay^b\)

Step-by-step explanation:

\(\frac{x^2(y^3)^4}{xy^5} = x^a * y^b\) = \(\frac{x^2(y^12)}{xy^5} = x^a * y^b\)

\(\frac{x^2(y^12)}{xy^5} = x^a * y^b\) = \(\frac{x^2(y^7)}{x} = x^a y^b\)

\(\frac{x^2(y^7)}{x} = x^a y^b\) = \(x^1y^7 = x^ay^b\)

\(x^1y^7 = x^ay^b\) = \(xy^7=x^ay^b\)

Answer:

(1/3) * (1/2) = (1/6)

Step-by-step explanation:

Probability of rolling a number greater then 4 is (1/3)

Probability of flipping heads is (1/2)

We multiply the 2 probabilities and get:

(1/3) * (1/2) = (1/6)

Answer:

what do you mean

Step-by-step explanation:

Answer:

576 ft²

Step-by-step explanation:

Large rectangle:

21·36=756

Smaller rectangle:

15·12=180

Find leftover area:

756-180

=576 ft²

Hope this helps! :)

Answer:

The area that is left for development in the field outside the playground is 576 ft².

Step-by-step explanation:

To calculate the area left for development in the field outside the playground, we need to subtract the area of the smaller rectangle from the area of the larger rectangle.

The area of a rectangle is the product of its width and length:

\(\boxed{\sf Area\;of\;a\;rectangle=width \times length}\)

The dimensions of the larger rectangle are:

The dimensions of the smaller rectangle are:

Therefore, the development area can be calculated as follows:

\(\begin{aligned}\sf Development \;area&=\sf Area_{large\;rectangle}-Area_{small\;rectangle}\\\\&=(21 \times 36)-(15 \times 12)\\\\&=756-180\\\\&=576\; \sf ft^2\end{aligned}\)

Therefore, the area that is left for development in the field outside the playground is 576 ft².

Answer:

3520 yards

-Max

The number of the yards in 2 miles will be 3520 yards. Then the correct option is A.

Conversion means to convert the same thing into different units.

We know that there are 1760 yards in one mile.

Then the number of the yards in 2 miles will be

2 miles = 1760 x 2 yards

2 miles = 3520 yards

Then the correct option is A.

More about the conversion link is given below.

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Answer:

Step-by-step explanation:

A cereal box has a height of 32 centimeters. It has a base with an area of 160 square centimeters.

What is the volume, in cubic centimeters, of the cereal box?

Answer:

7a+b-9c+17d

Step-by-step explanation:

-5 ( a-2b+3c -4d) - (-3) (4a -3b+2c-d)

Distribute

-5a+10b-15c+20d+12a-9b+6c-3d

Combine like terms

7a+b-9c+17d

7a + b - 9c + 17d

step-by-step explanation

(- 5)( a - 2b +3c - 4d ) - (-3)( 4a - 3b+2c - d )

- 5( a - 2b + 3c - 4d ) - (-3)( 4a - 3b + 2c - d)

Using Distributive property

- 5a + 10b - 15c + 20d + 12 a - 9b + 6c - 3d

Arranging like terms together

- 5a + 12a + 10b - 9b -15c + 6c + 20d -3d

7a + b - 9c + 17d

Answer:

I dont know if this is right, so please correct me if I am wrong!!!

Step-by-step explanation:

basically we want to find the unit price first: :)

4.50/10= 0.45

then the equation:

every pound of aluminum is 45 cents

so: Y= 0.45x

the graphing part is something I can't solve because I dont have a sketchpad, sorry!!!

-a friendly 8th grader :)

Answer:

Step-by-step explanation:

distance = rate times time, so

           distance

time = --------------

               rate

Here the distance is 40 km and the rate is x.  Then

              40 km

time = --------------  =  (40/x) hr

             x km/hr

If the speed is reduced by 2 km/hr, we get:

              40 km                                            40 km                  40

time = -------------------------------  or time = ----------------------- = --------- hr

             (x km/hr - 2 km/hr)                      (x - 2) (km/hr)       x - 2

The difference between the times is:

 40          40

-------- - --------- = 1 hr          Solve this for the original speed, x

x - 2         x

40x - 40x + 80                                80

-----------------------  =  1 hr     or     ------------ = 1     or 80 = x^2 - 2x

     x(x - 2)                                     x(x - 2)

Rewriting this in standard quadratic form:  x^2 - 2x - 80 = 0

Here a = 1, b = -2 and c = -80, and so the discriminant b^2 - 4ac is:

(-2)^2 - 4(1)(-80) = 324

The solutions are:

      -(-2) ± √324       2 ± 18

x = -------------------- = ------------ = 1 ± 9, or 10 (discard the other root)

              2                      2

The original speed was 10 km/hr

the answer is 10 km/hr.

1 feet = 12 inches

Note : We just need to judge whether it accords with "y = kx"

{Proportional relationship}

Answer:The scale factor is 20.

Step-by-step explanation:

6 INCHES = 1/2 FOOT

10 FOOT TO 1/2  FOOT = 10/(1/2) = 20/1

The scale factor is 20 to 1

or, since your scale is 6 in to 10 ft

you may list the scale factor as 1 to 20

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The scale factor is 20 .

To understand more, check below explanation.

Given that,

Size of the room on blue print = 6 inches

Actual size of the room = 10 feet

As we know that,

               1 feet = 12 inches

             6 inches = 1/2 feet

We have to find scale factor from 1/2 feet to 10 feet.

      \(\frac{10}{1/2}=\frac{10*2}{1} =20\)

Hence, the scale factor is 20 .

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Answer: 4:3 because 20 divided by 5 is 4 and 15 divided by 5 is 3.

Answer:

Step-by-step explanation:

basically here we wanna get y by itself

so

2x + 3y = -1

subtract 2x from both sides

3y = -2x -1

then to get y by itself we have to divide everything by 3

y = -2/3x - 1/3

this is your equation in slope intercept form

hope this helps <3

Answer:

37.5

Step-by-step explanation:

cosФ = \(\frac{A}{H}\)

cos(33°35') = \(\frac{m}{45}\)

m = 45 × cos(33°35')

m = 37.5 (1d.p.)

Answer:

Does it explain at all how many joseph started out with?

Step-by-step explanation:

I will try to figure it out.

Answer:

I think 27

Step-by-step explanation:

9 x 3 = 27...?

Answer:

No, because 1.875(25)-((25)+0.5(20))=11.875, which is less than 12.

Step-by-step explanation:

c = 25       d = 20

1.875(25) - (25+0.5*20) =

46.875 - 35 =

11.875

Answer:

Step-by-step explanation:

Midsegments of a triangle and a trapezoid are alike, because their endpoints, are the midpoints of the sides they touch. ... whereas, the length of a midsegment of a triangle is base/2.

The one difference in midsegments for triangles versus midsegments for trapezoids Midsegments of triangles and trapezoids are different because we can draw 3 of them in triangles, but only one in trapezoids.

A triangle is a three-sided closed-plane figure formed by joining three noncolinear points. Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.

A trapezoid, commonly referred to as a trapezium, is a quadrilateral or a polygon with four sides. It has a set of parallel opposing sides and a set of non-parallel sides. The bases and legs of the trapezoid are known as the parallel and non-parallel sides, respectively.

If a line through the midpoint of a leg of a trapezoid is parallel to its bases, then the line passes through the midpoint of the other leg.

The midsegment of a trapezoid is half the length of the two parallel sides.

The midsegment theorem states that a line segment connecting the midpoints of any two sides of a triangle is parallel to the third side of a triangle and is half of it.

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