Multiply. -1(-42)
A. -43
B. 42
C. -42
D. 43
Answer: B
Mathematics
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Round the numbers so that there is only one non-zero digit, and estimate the answer. Then perform the indicated operation to find the exact answer.91.5 - 9.25
A. estimate: 91; exact: 92.38 B. estimate: 81; exact: 82.25 C. estimate: 91; exact: 91.28 D. estimate: 81; exact: 82.35
Mathematics
The polar equation of a circle is given. Give polar coordinates for the center of the circle and identify its radius.r = 4 cos ?
A. C(4, 0), radius = 4 B. C(4, ?/2), radius = 4 C. C(2, 0), radius = 2 D. C(2, ?/2), radius = 2
Mathematics
Simplify the expression.
- 
A. 0
B. 
C. 
D. 3
Mathematics
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. -2
+ 5
- 
- 5
A. 21
+ 5
B. -21
+ 5
C. 21
- 5
D. -21
- 5
Mathematics