Solve the problem.The number of mosquitoes M(x), in millions, in a certain area depends on the June rainfall x, in inches: 
What rainfall produces the maximum number of mosquitoes?
A. 0 in.
B. 9.5 in.
C. 361 in.
D. 19 in.
Answer: B
Mathematics
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Write the expression in standard form.(7 + 3i) - (-9 + i)
A. 16 + 2i B. -2 + 4i C. -16 - 2i D. 16 - 2i
Mathematics
Solve the system by addition.
- 
= -18
+ 
= -9
A. {(0, 12)} B. {(12, 0)} C. {(0, -12)} D. {(-12, 0)}
Mathematics
Find the value of the determinant.
A. -37 B. 28 C. -28 D. 56
Mathematics
Decide whether the following is an expression or an equation. Simplify any expression or solve any equation.2(2x - 3) = 3(x + 4)
A. Equation; {18} B. Expression; 3x - 2 C. Expression; 3x + 2 D. Equation; {-6}
Mathematics