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Ad libitum [116K]

3 years ago

8

Explain the difference in meaning between |-3| and -3

1 answer:

rodikova [14]3 years ago

4 0

first one it is the absolute value of -3 and the other one is -3 itself absolute value of -3 mean 3

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Help me pleaseeeeeeeeeeeeeee

dangina [55]

Answer:

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3 years ago

How much of an alloy that is 40% copper should be mixed with 300 ounces of an alloy that is 80% copper in order to get an alloy

neonofarm [45]

X=40% amount
300-x=other amount

0.4x+300(0.8)=(x+300)0.5
expand
0.4x+240=0.5x+150
minus 0.4x both sides
240=0.1x+150
minus 150 both sides
90=0.1x
times 10 both sides
900=x

add 900oz of the 40% alloy

5 0

3 years ago