Simplify the expression without using a calculator.2-3

A. 8
B.
C. -8
D.


Answer: D

Mathematics

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Use a real number to represent the situation.Roseanne lost $908.57 on the stock market.

A. -908.57 B. +908.57

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Solve the problem.A domed ceiling is a parabolic surface. For the best lighting on the floor, a light source is to be placed at the focus of the surface. If 7 m down from the top of the dome the ceiling is 8 m wide, find the best location for the light source.

A. 2.3 m down from the top B. 1.8 m down from the top C. 1.2 m down from the top D. 0.6 m down from the top

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A manufacturer wants to enlarge an existing manufacturing facility such that the total floor area is 1.5 times that of the current facility. The floor area of the current facility is rectangular and measures 290 feet by 80 feet. The manufacturer wants to increase each dimension by the same amount. ?

A. A(x) = (290 - x)(80 - x) = 34,800 ft2 B. A(x) = (290 - x)(80 + x) = 34,800 ft2 C. A(x) = (290 + x)(80 - x) = 34,800 ft2 D. A(x) = (290 + x)(80 + x) = 34,800 ft2 E. A(x) = (290 - x)(80 - x) = -34,800 ft2

Mathematics