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schepotkina [342]
3 years ago
10

Christopher’s backyard is shaped like a rectangle with a length of 2x + 5 feet and a width of 4x - 7 feet.

Mathematics
1 answer:
Doss [256]3 years ago
8 0

Answer:

8x² + 6x - 35

Step-by-step explanation:

A = (2x + 5)(4x - 7)

Front: 2x * 4x = <em>8x²</em>

Outside: 2x * (-7) = <em>-14x</em>

Inside: 5 * 4x = <em>20x</em>

Last: 5 * -7 = <em>-35</em>

Add up: <em>8x² - 14x + 20x -35</em>

Simplify: 8x² + 6x - 35

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Write an equation that represents the line?
yarga [219]

Answer:

An equation that represents the line is:

y = 3/4x - 9/2

Step-by-step explanation:

The slope-intercept form of the line equation

y = mx+b

where

  • m is the slope
  • b is the y-intercept

Given the attached graph of a line.

Taking two points from the line, such as

  • (2, -3)
  • (6, 0)

Determining the slope between (2, -3) and (0, 6)

\left(x_1,\:y_1\right)=\left(2,\:-3\right),\:\left(x_2,\:y_2\right)=\left(6,\:0\right)

m=\frac{0-\left(-3\right)}{6-2}

refine

m=\frac{3}{4}

substituting m = 3/4 and the point (2, -3) in the slope-intercept form of the line equation

y = mx + b

\left(-3\right)=\frac{3}{4}\left(2\right)+b

\frac{3}{2}+b=-3

subtract 3/2 from both sides

\frac{3}{2}+b-\frac{3}{2}=-3-\frac{3}{2}

b=-\frac{9}{2}

now substituting b = -9/2 and m = 3/4 in the slope-intercept form of the line equation

y = mx + b

y = 3/4x + (-9/2)

Therefore, an equation that represents the line is:

y = 3/4x - 9/2

5 0
3 years ago
Please help , will grant brainliest if correct !!
Leokris [45]

Answer:

- 4

Step-by-step explanation:

The average rate of f(x) in the closed interval [ a, b ] is

\frac{f(b)-f(a)}{b-a}

Here [ a, b ] = [ - 2, 2 ]

f(b) = f(2) = 9 ← from table value of f(x) for x = 2

f(a) = f(- 2) = 25 ← from table value of f(x) for x = - 2, thus

average rate of change = \frac{9-25}{2-(-2)} = \frac{-16}{4} = - 4

3 0
4 years ago
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fiasKO [112]
He needs three more packets of bread rolls. Or he can get one more packet of sausages (24 sausages) and six more packets of bread rolls (24 bread rolls.
6 0
3 years ago
An interior angle of a regular polygon has a measure of 120°. What type of polygon is it? decagon hexagon quadrilateral octagon
Kobotan [32]

The answer is Hexagon

7 0
3 years ago
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Natalka [10]
<span>(2a)^3 =8a^3

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3 years ago
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