Solve the problem.Anne and Nancy use a metal alloy that is 16% copper to make jewelry. How many ounces of an alloy that is 10% copper must be mixed with an alloy that is 20% copper to form 55 ounces of the desired alloy?
A. 38 ounces
B. 33 ounces
C. 22 ounces
D. 24 ounces
Answer: C
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State whether you think the difference between what occurred and what you would expect by chance is statistically significant.In eighteen of the last twenty years the annual precipitation in a certain region has been less than in the previous year.
A. Statistically significant B. Not statistically significant
Solve the inequality and graph. Express your answer in interval notation.24x + 8 > 4(5x + 7)
A. [5, ?)
B. (-?, 5]
C. (-?, 5)
D. (5, ?)
Factor completely. If the polynomial cannot be factored, say it is prime.(x + 8)2 - 25
A. (x - 3)(x - 13) B. (x + 33)(x - 17) C. (x + 13)(x + 3) D. x2 + 16x + 39
Simplify the algebraic expression.5(2x - 1) - 4(x - 3)
A. -10x + 7 B. 6x - 4 C. 6x - 17 D. 6x + 7