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3 years ago

Solve for j.-13j - 20 = -8j + 20

Mathematics

1 answer:

aleksley [76]3 years ago

8 0

Answer:

j = -8

Step-by-step explanation:

-13j - 20 = -8j + 20

Add 13 j to each side

-13j+13j - 20 = -8j+13j + 20

-20 = 5j+20

subtract 20 from each side

-20-20 = 5j +20-20

-40 = 5j

Divide by 5

-40/5 = =5j/5

-8 =j

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Answer:

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Step-by-step explanation:

Let the Width of rectangle be 'W' inches.

The length of a rectangle be 'L' inches.

Area of rectangle given is 36 square inches.

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To Find:

Length = L = ?

Width = W = ?

Solution:

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We have area of rectangle given as

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Which is a Quadratic Equation, So by Splitting the middle term we get

$W^{2}-18W-2W+36=0\\W(W-18)-2(W-18)=0\\(W-2)(W-18)=0\\\therefore W=2\ inches\ or\ W =18\ inches$

Therefore the Length will be

$L=20-W=20-2=18\ inches\\OR\\L=20-18=2\ inches$

Therefore the Dimensions are

Length =18 inches and Width = 2 inches

Length =2 inches and Width = 18 inches

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Solve for j.-13j - 20 = -8j + 20​

Solve for j.-13j - 20 = -8j + 20