Solve the equation.-21.7 - k = 18.9
A. 2.8
B. 40.6
C. -2.8
D. -40.6
Answer: D
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Solve the problem using two linear equations in two variables and Cramer's rule.A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 3% cement should he mix with 3 bags of 45% cement to produce a mix containing 10% cement?
A. 17 bags B. 18 bags C. 23 bags D. 15 bags
Write the quadratic equation in standard form. Determine the values of a, b, and c.7 - 2x + 9x2 = 0
A. 0 = -9x2 + 2x - 7 a = 9, b = -2, c = 7 B. 9x2 - 2x + 7 = 0 a = -9, b = 2, c = -7 C. 9x2 - 2x + 7 = 0 a = 9, b = -2, c = 7 D. 0 = -9x2 - 2x - 7 a = -9, b = 2, c = -7
Solve the problem.Helen Weller invested $13,000 in an account that pays 3% simple interest. How much additional money must be invested in an account that pays 6% simple interest so that the average return on the two investments amounts to 4%?
A. $13,000 B. $6500 C. $10,000 D. $9000
Provide an appropriate response.Is the logarithm to the base 3 of 2 written as "log2
" or"log3
"?
Fill in the blank(s) with the appropriate word(s).