The length of the rectangle is one units more than the width. The area of the rectangle is 56 units. What is the width, and units, of the rectangle?

Width is x.

Length is (x + 1).

Area = length*width

56 = x(x+1)

x² + x - 56 = 0

(x+8)(x-7)=0

x = - 8, or x = 7

"- 8" is impossible for width.

So, width x = 7

Length = (x+1) = 7+1 = 8

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

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-2

7 - 9 = -2

reversed:

-2 + 9 = 7