Solve.Amy can clean the house in 7 hours. When she works together with Tom, the job takes 4 hours. How long would it take Tom, working by himself, to clean the house?
A. 10
hr
B. 3 hr
C. 9
hr
D. 9
hr
Answer: C
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Determine if the given set of whole numbers is closed under multiplication.{1, 2, 3, 4, . . . }
A. Closed B. Not closed
Find the product.(x2 - 8)2
A. x4 - 16x2 + 64 B. x4 - 8x2 + 64 C. x4 - 8x + 64 D. x4 + 64
Solve the equation.3(2x - 38) = 6x - 114
A. - 
B. all real numbers
C. ?
D. - 19
Translate the problem situation to a system of equations. Do not solve.Bill & Jose's Discount Cinema sold adult tickets for $2.50 each and children's tickets for $1.80 each. Last Tuesday, a total of $338.20 was collected from 149 movie watchers. How many of each type were sold?
A. x + y = 4.30; 2.50x + 1.80y = $338.20 B. x + y = 149; 2.50x + 1.80y = $338.20 C. x + y = 338.20; 2.50x + 1.80y = $149 D. x - y = 149; 2.50x + 1.80y = $338.20