Question

I need the answer to question 8. 50 points up for grabs

Answer 1

Let iron =x

There is 1.5 times the amount of zinc then there is iron, so zinc = 1.5x

There is 3 times as much copper then there is zinc, so 1.5*3=4.5, so copper equals 4.5x

Answer 2

Let iron = x

There is 1.5 times the amount of zinc that there is iron, so you get zinc = 1.5x

There is 3 times as much copper as there is zinc, so 1.5 x 3 = 4.5, so copper equals 4.5x

Now all three need to equal the total weight of 210:

X + 1.5x + 4.5x = 210

Simplify:

7x = 210

Divide both sides by 7:

x = 210 /7

x = 30

Now you have a value for x, you can solve for the amount of each material.

Iron = x = 30 g

Zinc = 1.5x = 1.5(30) = 45 g

Copper = 4.5x = 4.5(30) = 135g

There is 45 g of zinc.