Multiply. Simplify, if necessary.-21 ? 
A. 
B. -12
C. - 
D. 12
Answer: D
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Write the series and find the sum.
A. 14 + 17 + 20 = 51 B. 4 + 7 + 10 + 13 = 34 C. 8 + 11 + 14 + 17 + 20 + 23 = 93 D. 14 + 17 + 20 + 23 = 74
Solve the problem.On average, the number of electric guitars sold in Texas each year is 76,440, which is about seven times the average number of guitars sold each year in Wyoming. How many electric guitars, on average, are sold in Wyoming?
A. 10,920 guitars B. 535,080 guitars C. 7644 guitars D. 76,440 guitars
Solve the triangle.a = 7, c = 5, B = 90°
A. b = 8.6, A = 35.5°, C = 54.5° B. b = 7.6, A = 35.5°, C = 54.5° C. b = 9.6, A = 54.5°, C = 35.5° D. b = 8.6, A = 54.5°, C = 35.5°
Solve the equation by extracting the square roots.
2 = 81
A. x = -14 or x = 4
B. x = 
or x = 
C. x = - 
or x = 
D. x = - 
or x = 