Add or subtract. Assume all variables represent positive real numbers.-7
+ 2
A. -5
B. 11
C. 3
D. -3
Answer: D
Mathematics
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Perform the indicated operation. Write the result in the form a + bi.
? 
A. 10
B. 10i
C. -10i
D. -10
Mathematics
Solve the equation by completing the square.2x2 + 12x = - 7
A. 
B. 
C. 
D. 
Mathematics
Locate and classify all critical points for the given function.f(x,y) = 4 - (x2 - y2)
A. Saddle point at (0, 0) B. Maximum of 4 at (0, 0) C. Minimum of 4 at (0, 0) D. None of the above is correct.
Mathematics
Solve the problem.$1500 is invested at 7% compounded quarterly. In how many years will the account have grown to $8000? Round to the nearest tenth of a year.
A. 24.7 years B. 1.3 years C. 24.1 years D. 17.6 years
Mathematics