Solve.If y varies jointly with x and z and inversely with n and y = 49 when x = 2, 
and 
find y when 
z = 5, and n = 10.
A. 42
B. 21
C. 35
D. 84
Answer: A
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Calculate the direction of 
and the midpoint of line segment P1P2.P1(-5, -7, 2) and P2(-3, -13, -1)
A. 
i - 
j - 
k; 
B. 
i + 
j + 
k; 
C. 
i - 
j - 
k; 
D. 
i - 
j - 
k; 
Simplify the expression.10(2x2 + 6) - (2x2 - 3)
A. 18x2 + 63 B. 22x2 + 9 C. 22x2 + 3 D. -18x2 + 57
Solve the problem. First use front end rounding. Then find the exact answer.The table shows the approximate price for several items that Tracy would like to purchase as gifts for her friends. How much will she need to spend in order to purchase a jacket, a coffee mug, a tee shirt, and basket of assorted nuts and candy?
A. Estimate: $110; exact: $99 B. Estimate: $100; exact: $112 C. Estimate: $110; exact: $114 D. Estimate: $110; exact: $112
Solve the quadratic equation by completing the square.x(x - 2) = 35
A. -7, 1 B. -7, 5 C. 7, 5 D. -5, 7