Find the product and simplify. Assume all variables represent nonnegative real numbers.(7
+ 9)(4
+ 4)
A. 36 + 28
+ 28
B. 64
+ 28
C. 92
D. 92 + 64
Answer: D
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Perform the indicated operation. Simplify the result if possible.9 yd 2 ft + 5 yd 2 ft
A. 15 yd 1 ft B. 14 yd 1 ft C. 15 yd 2 ft D. 14 yd 2 ft
Simplify the expression.3g + 18 - 5
A. 16g B. 3g + 13 C. 3g - 13 D. 3g + 23
A study conducted by Uni-Mart, a mail-order department store, reveals that the time intervals in minutes between incoming telephone calls on its toll-free 600 line between 10 A.M. and 3 P.M. are exponentially distributed with probability density function 
.
?
What is the probability that the time interval between successive calls is more than 5 min? Give the answer to four decimal places, if necessary.
Fill in the blank(s) with the appropriate word(s).
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.-4x + y + 3z - w = 2 -x - 3y + z - 3w = -1 -3x + 3y - 4z + w = -4 3x - y - z - 3w = -11
A. (1, -4, -1, 5) B. (-1, 2, -1, -3) C. (-1, -2, 1, 3) D. No solution