The following expressions represent denominators of rational expressions. Find their LCD.r2 + 6r + 9 and r2 + 3r
A. r(r + 3)
B. (r + 3)2
C. r(r + 3)2
D. r(r + 1)(r + 3)
Answer: C
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Factor completely.9x2 + 43x - 10
A. (x + 5)(9x - 2) B. (x - 5)(9x - 2) C. (2 - 9x)(9x - 2) D. (9x - 12)(9x - 2)
Estimate the magnitude of the error involved in using the sum of the first four terms to approximate the sum of the entire series.
A. 1.00 × 10-11 B. 1.11 × 10-10 C. 9.09 × 10-13 D. 8.33 × 10-14
Solve the problem.A polygon with n sides has D diagonals, where D is given by the function D(n) = 
. Find the number of sides n if 77 ? D ? 170.
A. The number of sides is between 13 and 21, inclusive. B. The number of sides is between 14 and 20, inclusive. C. The number of sides is between 12 and 21, inclusive. D. The number of sides is between 15 and 20, inclusive.
Solve the problem.Carla Smith had $2200 in her savings account on May 1. She then deposited $500 on May 31 and $1000 on June 15. Find the balance in the account on August 15. Assume 3
% interest compounded daily.
A. $3731.90 B. $3732.78 C. $3732.47 D. $3732.00