Write the expression with positive exponents only. Then simplify, if possible.(-4)-2
A. - 
B. 16
C. 
D. -16
Answer: C
Mathematics
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Find the absolute value.|-21|
A. 21 B. ± 21 C. -21 D. 0
Mathematics
Complete the equation so the result is an identity. 
+ sin2x = 1
A. tan2x B. sin2x C. csc2x D. cos2x
Mathematics
Find the average rate of change for the function between the given values.f(x) = 7x3 - 3x2 + 8; from -8 to 3
A. 
B. 
C. 
D. 358
Mathematics
Write the proportion.$15 is to 40 bottles as $27 is to 72 bottles.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics