5) Anne and Nancy use a metal alloy to make jewelry. How many ounces of an alloy that is 13% copper must be mixed with an alloy that is 11% copper to form 55 ounces of an alloy that is 16% copper. Set up a system A) x+y = 55
.13x+.11y=.16(55)
B) x+y=.16
.13x+.11y=55
C) x+y=55
.13x+.11y=.16
D) x+y = 55
.13x+.11y=.(55)

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

answer: 72: 111

step-by-step explanation:

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