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3 years ago

10

A swimming pool and deck are built in a rectangle with length 40 ft and width 18 ft. If the pool itself is 320 square feet, what

is the area of the deck itself?

1 answer:

stich3 [128]3 years ago

8 0

320x2=640
64u0x18=435
ugddx bb v

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Please help me please help i will give up vote and 5 star please and follow

Afina-wow [57]

Answer:

C. y = 4x, table B, graph A

Step-by-step explanation:

Charges = $4 per hour (this is the slope, m,)

m = 4

The equation can be represented in the form of y = mx

Where,

m = slope = 4

Substitute m = 4 into y = mx

Thus:

y = 4x

✔️The table that represents the equation y = 4x showing that for 1 hour, the charges is $4 is table B (x = 1, y = 4).

Table B represents the parking cost.

✔️The equation with a slope of 4 is the equation that represents the parking cost. Thus, in graph A, when x = 1 (hour), y = 4 (cost).

Therefore, graph A is the answer.

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3 years ago

an airplane can reach a speed of 650 miles per hour. how long will it take the airplane to travel a distance of 1,950 miles at t

galben [10]

Answer:

it will be 3 hours because just divide 1950 by 650

6 0

3 years ago

I need help understanding this ASAP plz, I have a quiz over this next week!!!!

scZoUnD [109]

Answer:

Step-by-step explanation:

With any two points, you can find the line between them with:

$y = mx + b\\where\\m = \frac{y_2-y_1}{x_2-x_1}$

#1:

(-1, 1) -> (1, 3) $m = \frac{3-1}{1-(-1)} = 1, 3 = 1(1) + b, b = 2, y = x + 2$

(3, 4) -> (0, 2) $m = \frac{4-2}{3-0} = \frac{2}{3}, 2 = \frac{2}{3}(0) + b, y = \frac{2}{3}(x)+2$

(0, 1) -> (3, 3) $m = \frac{3-1}{3-0} = \frac{2}{3}, 1 = 2/3(0) + b, y = \frac{2}{3}(x) + 1$

Lines b and c are parallel because they have the same slopes

#2 is a bit easier

a: 2y = x + 12, $y = \frac{1}{2}(x) + 6$

b:2y - x = 5, $y = \frac{1}{2}(x) + \frac{5}{2}$

c: 2y + x = 4, $y = \frac{-1}{2}(x) + 2$

Since lines a and b have the same slope, they are parallel

#3:

(1, 3), y = 2x - 5

We have to find a line with a slope of 2 that passes through the two points

$y = 2x + b\\3 = 2(1) + b\\b = 1\\\\y = 2x + 1$

#4:

(-2, 1) , y = -4x + 3

We have to find a line with a slope of-4 that passes through the line

$y = -4x + b\\1 = -4(-2) + b\\1 = 8+ b\\b = -7\\y = -4x - 7$

#5:

(-2, 3) (1, -1), $m = \frac{3-(-1)}{-2-1} = \frac{-4}{3}, 3 = \frac{8}{3} + b, b = \frac{1}{3}, y = \frac{-4x}{3} + \frac{1}{3}$

(-3, 1) (1, 4), $m = \frac{4-1}{1-(-3)} =\frac{3}{4}, 4 = \frac{3(1)}{4} + b, y = \frac{3}{4}(x) + \frac{13}{4}$

(0, 2) (3, -2) $m = \frac{2-(-2)}{0-3} = \frac{-4}{3} , 2 = b, y = \frac{-4}{3}(x) + 2$

Since lines c and b have negative reciprocal slopes, they are perpendicular

#6:

a: y = -4x + 7

b: x = 4y + 2, $y = \frac{x}{4} - \frac{1}{2}$

c: -4y + x = 3, $y = \frac{x}{4} - \frac{3}{4}$

since lines a and c have negative reciprocal slopes, they are perpendicular

6 0

3 years ago

Plsss I need help.

Citrus2011 [14]

Answer: 0.5

Step-by-step explanation:

5 0

3 years ago

What is the average rate of change for this exponential function for the

Bingel [31]

Answer:

Option (D).

Step-by-step explanation:

In the figure attached,

An exponential function has been graphed with certain points marked on it.

To find the average rate of change for this function between the given interval we will use the formula,

Average rate of change = $\frac{f(x_2)-f(x_1)}{y_2-y_1}$

where $f(x_2)$ = value of the function at x = 4

$f(x_1)$ = value of the function at x = 2

By substituting these values in the formula,

Average rate of change = $\frac{16-4}{4-2}$

= $\frac{12}{2}$

= 6

Therefore, Option D will be the answer.

7 0

3 years ago