Find the mean of the list of data.81, 92, 66, 88, 63
A. 81
B. 92
C. 78
D. 65
Answer: C
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Solve the problem.The sum of two numbers is 16, and the sum of their squares is 136. Find the numbers.
A. 6 and 10 B. 5 and 11 C. 4 and 12 D. 3 and 13
Find the x- and y-coordinates of the following labeled points.
A. G(5, 26); H(-2, -5) B. G(5, -2); H(5, -2) C. G(5, 5); H(-2, -5) D. G(5, 5); H(-5, -2)
Solve the variation problem.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 5 feet from a light is 3 foot candles, find the intensity on a screen 20 ft from the light.
A. 
foot-candles
B. 
foot-candles
C. 2 foot-candles
D. 1
foot-candles
Solve the equation. Write complex solutions in standard form.x2 + x + 6 = 0
A. - 
± i
B. 1 ± i
C. -1 ± i
D. 
± i