Solve the problem.Anne and Nancy use a metal alloy that is 21.1% copper to make jewelry. How many ounces of an alloy that is 18% copper must be mixed with an alloy that is 25% copper to form 140 ounces of the desired alloy?
A. 67 oz
B. 80 oz
C. 62 oz
D. 78 oz
Answer: D
Mathematics
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Give the coordinates of the points shown on the graph.
A. A(6, 2), B(-3, 7) B. A(6, 7), B(2, 7) C. A(2, 28), B(7, -3) D. A(6, 2), B(7, -3)
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Solve the problem.In Little League, Andrew hit 8 home runs in 80 at-bats. What percent of the at-bats were not home runs?
A. 87% B. 92% C. 90% D. 95%
Mathematics
Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(7x + y)(7x - y)
A. 49x2 - 14xy - y2 B. 49x2 - y2 C. 14x2 - y2 D. 49x2 + 14xy - y2
Mathematics
Find the sum of the even integers between 49 and 101.
Fill in the blank(s) with the appropriate word(s).
Mathematics