Solve the problem.The area of a square is 81 square centimeters. If the same amount is added to one dimension and removed from the other, the resulting rectangle has an area 9 square centimeters less than the area of the square. How much is added and subtracted?
A. 9 cm
B. 12 cm
C. 4 cm
D. 3 cm
Answer: D
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A. True B. False
Solve problems using a calculator.An electric meter installed by a construction company at a work site read 986 kilowatt hours on July 1 and 10,649 kilowatt hours on August 1. How many kilowatt hours of electricity were used at the site during the month of July?
A. 9662 kilowatt hours B. 9665 kilowatt hours C. 9663 kilowatt hours D. 9664 kilowatt hours
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A. 89 cm B. 89 km C. 89 mm D. 89 m
Solve.5x + 2y + z = -112x - 3y - z = 177x + y + 2z = -4
A. (0, 6, -1) B. (0, -6, 1) C. (-3, 0, 4) D. (3, 0, -4)