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3 years ago

The length of a rectangle is 2 cm more than 3 times its width. Find the length of the rectangle if the perimeter is 44 cm

1 answer:

6 0

L = 3W + 2

P = 2W + 2L

44 = 2W + 2 * (3W + 2)

44 = 2W + 6W + 4

40 = 8W

W = 5

Substitute back into L equation;

L = 3 * 5 + 2

L = 17

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Fofino [41]

Answer:

1440 cubic cm

Step-by-step explanation:

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2 years ago

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Kenyon ran for 8 miles each week while training. Here is his record of the number of miles he ran.

diamong [38]

Step-by-step explanation:

Let x be the miles Kenyon ran on tuesday

Let y be the miles Kenyon ran on thursday

Given,

Mon + Tues + Wed + Thu = 8mi

$1.2 + x + 1.6 + y = 8 \\ 2.8 + x + y = 8 \\ x + y = 8 - 2.8 \\ x + y = 5.2$

also given,

$y = x + 0.4 \\ - x + y = 0.4$

Now we have x + y = 5.2 as equation 1 and -x + y = 0.4 as equation 2

Using equation 1,

$x + y = 5.2 \\ x = 5.2 - y$

Substitute this equation into equation 2.

$- (5.2 - y) + y = 0.4 \\ - 5.2 + y + y = 0.4 \\ - 5.2 + 2y = 0.4 \\ 2y = 0.4 + 5.2 \\ 2y = 5.6 \\ y = 5.6 \div 2 \\ = 2.8mi$

Substitute y = 2.8 into equation 1.

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Therefore Kenyon ran 2.4 miles on tuesday, and ran 2.8 miles on thursday.

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2 years ago

NEED HELP FAST 1. Simplify 9^2/9^7. A.9^5 B.1/9^9 C.1/9^-5 D.1/9^5

saveliy_v [14]

Subtract the exponents when the base number is the same.

2 - 7 = -5

So 9^-5 or 1/9^5.

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2 years ago

Suppose you cut a small square from a square of fabric as shown in the diagram. Write an expression for the remaining shaded are

eduard

The area of the larger square is x^2
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To find the area of the shaded region you subtract the two values.
x^2 - 9

The factored form of this is (x + 3)(x - 3)

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3 years ago

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Passes thru (2,-1) with slope of 6

Gemiola [76]

Answer:

y = 6x - 13

Step-by-step explanation:

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2 years ago

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