State the solution set of the inequality in interval notation and sketch its graph.15x + 15 > 3(4x + 7)
A. [2, ?)
B. (-?, 2)
C. (12, ?)
D. (2, ?)
Answer: D
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Solve the problem.Find the average value of f(x, y, z) = 3x + 8y + 5 over the rectangular solid in the first octant bounded by the coordinate planes and the planes 
, 
, 
.
A. 
B. 140
C. 104
D. 68
Write the rational expression in simplest form.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Solve the problem.Between 8:30 a.m. and 9:30 a.m., cars drive through the Cappuccino Express at a rate of 12 cars per hour (0.2 per minute). The following formula from probability can be used to determine the probability that a car will arrive within t minutes of 8:30a.m. F(t) = 1 - e-0.2tDetermine how many minutes are needed for the probability to reach 0.6.
Fill in the blank(s) with the appropriate word(s).
Write a matrix equation equivalent to the system of equations. 3x + 7y = -4-4x - 2y = -4
A. 
=
B.
  = |
C.
=
D.
= 