jzz88
30.09.2019 •
Mathematics
Liliana decides to crop a square photo 2 inches on each side to fit it into a frame. the area of the original photo was 121 square inches. in the equation (x + 2)2 = 121, x represents the side measure of the cropped photo.
what are the dimensions of the cropped photo?
8 inches by 8 inches
9 inches by 9 inches
12 inches by 12 inches
13 inches by 13 inches
Solved
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Ответ:
For easier computation, I just substituted x by the value given in the choices and solved the equation.
(8 + 2)² = 121 ⇒ 10² = 121 ⇒ 100 ≠ 121
(9 + 2)² = 121 ⇒ 11² = 121 ⇒ 121 = 121
The dimension of the cropped photo is 9 inches by 9 inches.
Ответ:
9
Step-by-step explanation: