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3 years ago

Select all the fractions that are equivalent to -2/3 .

Mathematics

1 answer:

mote1985 [20]3 years ago

6 0

Answer:

A) -3/2 = False

B) -2/-3 = False

C) 2/-2 = False

D) -3/-2 = False

E) - 2/3 = True

F) 2/3 = False

Step-by-step explanation:

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An alloy consists of nickel, zinc, and copper in the ratio 2:7:9. How many pounds of nickel have to be used to create alloy that

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We are given ratio nickel to zinc to copper = 2:7:9.

From this ratio we can see that <em>ratio of nickel to zinc is 2:7</em>.

Let us assume number of pounds of nickel have to be used to create alloy that contains 4.9 lb of zinc is x pounds.

So, we can setup a proportion as :

x : 4.9 = 2:7

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On cross multiplication, we get

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Dividing both sides by 7, we get

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<h3>Therefore, 1.4 pounds of nickel have to be used to create alloy that contains 4.9 lb of zinc.</h3><h3 />

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