Simplify the algebraic expression by collecting and combining like terms.-4.5(10r + 4) + 3.5(9r + 5)
A. 5.5r - 0.5
B. -13.5r + 4
C. -13.5r - 0.5
D. -63r
Answer: C
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Solve the problem.Kafka Inc. imports hard drives and sells them on the internet. The profit is given by the equation 
where n is the number of hard drives sold. Graph 
for n < 1000. How many hard drives must be sold for the company to break even? Round your answer to the units place, in other words, to the nearest number of hard drives.
A. 67 hard drives B. 45 hard drives C. 51 hard drives D. 47 hard drives
A formula is given along with the values of all but one of the variables in the formula. Find the value of the variable not given.A = 
bh; b = 8, h = 18
A. 72 B. 26 C. 144 D. 26.5
Write the rational expression in lowest terms.
A. 
B. 
C. 
D. 
Perform the indicated operation.- 
? 
A. 
B. 
C. - 
D. - 