Solve the problem.Anne and Nancy use a metal alloy that is 19% copper to make jewelry. How many ounces of an alloy that is 12% copper must be mixed with an alloy that is 25% copper to form 65 ounces of the desired alloy?
A. 40 ounces
B. 35 ounces
C. 32 ounces
D. 30 ounces
Answer: D
Mathematics
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Solve the problem.In 1995 the United States recovered 20% of its municipal wastes through recycling, up from 17% in 1990. Let P represent the percentage recycled and t the number of years since 1990. Find a linear function P(t) that fits this data. Use this function to predict the percentage recycled in 2003.
A. 21.2% B. 26.5% C. 22.9% D. 24.8%
Mathematics
Graph.y = 
x
A. 
B. 
C. 
D. 
Mathematics
Find the value of the determinant.
A. 960 B. -600 C. -156 D. 156
Mathematics
Use mathematical induction to prove that the statement is true for every positive integer n.12 + 42 + 72 + . . . + (3n - 2)2 = 
What will be an ideal response?
Mathematics