The area is 396 square feet. the length is (x+3) and the width is (x+7) feet. find the dimensions of the room

The dimensions are 18 feet by 22 feet.

Step-by-step explanation:

The length is (x+3) and the width is (x+7) feet.

The area is 396 square feet.

The area is found by multiplying length and width.

=>

=>

=>

Now solving this quadratic equation, we get the roots ;

x = 15 and x = -25 (ignore the negative value)

Hence we will take x = 15

The length is (x+3) = = 18 feet

The width is (x+7) = = 22 feet

We can check this as :

(length x width = area)

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

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