Multiply, and then simplify if possible. Assume all variables represent positive real numbers.(
+ -4)(
- 3
- 7)
A. 
- 11
+ 12
- 3
+ 28
B. -3
+ 
- 11
+ 12
+ 28
C. -3
- 10
+ 12
+ 28
D. -11
+ 12
- 3
+ 
+ 28
Answer: B
Mathematics
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= 
A. 3 B. 63 C. 21 D. 42
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Solve the problem.An open (no top) box has height h and a square base with side length s. Its total surface area is 800 cm2. Find ds/dh in terms of s and h.
A. 
= 
B. 
= 
C. 
= 
D. 
= -2 - 
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Using the addition/subtraction method, find the value of x and y to satisfy the following equations: 2x + 4y = 8; 2x + 2y = 2
a. x = -2 y = -3 b. x = -3 y = -2 c. x = 3 y = 2 d. x = -2 y = 3 e. x = 2 y = -3
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Find the derivative.
A. 
B. 
C. ex7+1
D. ex+1
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