Solve the problem.If the shaded "rectangular ring" is a gnomon to the white rectangle, then x =
A. 10.
B. 15.
C. 20.
D. 3.
E. none of these
Answer: B
Mathematics
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Perform the indicated operation.18 + (-12) + (-18)
A. 48 B. -12 C. 24 D. 12
Mathematics
Multiply and simplify.
? 108x
A. 
B. 
C. 6,804x
D. 
Mathematics
Decide whether the equation is conditional, an identity, or a contradiction. Give the solution set.2(x - 5) + (2x) = 4(x - 7) - 2
A. Conditional; {0} B. Identity; {all real numbers} C. Conditional; {-3} D. Contradiction; ?
Mathematics
Solve the problem.An initial investment of $480 is appreciated for 4 years in an account that earns 12% interest, compounded quarterly. Find the amount of money in the account at the end of the period.
A. $755.29 B. $770.26 C. $747.82 D. $290.26
Mathematics