Perform the indicated operation and simplify. Write the answer in the form a + bi.(-8 - 7i) + (15 + 4i)
A. 15 - 3i
B. 7 + 3i
C. 7 - 3i
D. 15 + 3i
Answer: C
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Solve the problem.Ron takes two hr more time than Paul to mow the lawn. Working together they can mow the lawn in 
. How long does it take each of them working alone? Round to the nearest tenth, if necessary.
A. Paul: 8 hr; Ron: 10 hr B. Paul: 10 hr; Ron: 12 hr C. Paul: 8.3 hr; Ron: 10.3 hr D. Paul: 9.1 hr; Ron: 11.1 hr
Multiply. Then find an estimate for the product by rounding the factors to their greatest place value to see if your exact product is reasonable.488 ? 984
A. 238,144; 480,192 B. 480,192; 500,000 C. 480,202; 1500 D. 480,192; 480,200
Solve the equation.
(r + 6) = 
(r + 8)
A. 1 B. 2 C. -2 D. -1
Solve the problem.The graph of a trigonometric function f represented by f(t) = a sin (b(x - c)) is shown, where a, b, and c are nonnegative. State the period.
A. 4 B. 3? C. 1 D. 4?