Factor the perfect square trinomial completely.81m2 + 162m + 81
A. (9m - 9)2
B. (9m + 9)2
C. 81(m - 1)2
D. 81(m + 1)2
Answer: D
Mathematics
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Solve the problem.Suppose that the revenue from selling x radios is r(x) = 70x - 
dollars. Use the function r '(x) to estimate the increase in revenue that will result from increasing production from 120 radios to 121 radios per week.
A. $45.80 B. $46.00 C. $94.00 D. $58.00
Mathematics
Solve problems using a calculator.15 × 49 + 81 × 32 - 2496 ÷ 52
A. 458 B. 3268 C. 3279 D. 454
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Evaluate the sum using the given information.x1 = -5, x2 = 4, x3 = 5, x4 = 3, and?x = 0.1; f(x) = x2
A. 7.5 B. 30 C. 1.1685 D. 5.7
Mathematics
Solve the problem.Peter must practice the piano 
per week. He has already practiced 
How many more hours does he need to practice?
A. 
hr
B. 2
hr
C. 3
hr
D. 
hr
Mathematics