Write the phrase as a variable expression. Use x to represent "a number."Eleven subtracted from a number
A. 11 - x
B. x - 11
C. 11x - 11
D. 
Answer: B
Mathematics
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Find the missing dividend or divisor. 
= 2x7 + 5x2 + x
A. 2x8 - 5x3 + x2 B. 2x8 + 5x3 + x C. 2x8 + 5x3 - x2 D. 2x8 + 5x3 + x2
Mathematics
Determine the area of the triangle. If necessary, round the answer to two decimal places.A = 83°, b = 9, 
A. 3.29 B. 26.80 C. 27.01 D. 53.60
Mathematics
Approximate the area of the triangle to the nearest tenth.a = 151, b = 160, c = 172
A. 13,908 B. 716 C. 11,126.4 D. 16,689.6
Mathematics
Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = 0 B. x = 3 C. x = -3 D. none
Mathematics