The dimensions of a square are altered so that one dimension is increased by 7 feet, while the other is decreased by 2 feet. the area of the resulting rectangle is 90ft squared. find the original area of the square.

the original area is 64ft squared or 169ft squared more perdurable 64  

Step-by-step explanation:

(x-2)(x+7)=90

x^2 +5x -14=90

x^2 +5x -14 -90=90-90

x^2 +5x -104=0

factor it out

(x−8)(x+13)=0

so 8 or -13

answer: it is 1: 47 pm

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify