Factor. Check by multiplying.5x2y + 40xy
A. 5x(x + 8y)
B. 5xy(x + 8)
C. 5x(xy + 8y)
D. 5xy(x + 1)
Answer: B
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Determine whether the argument is valid or invalid.If Cathy is a gambler, then she lives in Marine. Cathy lives in Marine and she loves horses. Therefore, if Cathy does not love horses, she is not a gambler.
A. Valid B. Invalid
Solve the problem.A wind has an easterly component of 7 km/h and a northerly component of 17 km/h. Find the direction of the wind.
A. E 37.5° N B. E 22.4° N C. E 52.5° N D. E 67.6° N
Find the exact value of the expression without using a calculator or table.cot-1 (1)
A. 
B. 0
C. 
D. 1
Answer the question.A retailer finds that total costs per day are given by c = 144
+ 36, where c is cost and n is units sold. What is c when no units are sold?
A. $36 B. $864 C. $180 D. $72