Answer:
15 inches
Step-by-step explanation:
let n = side length
(n + 2.5) x 4 = 70
4n + 10 = 70
4n = 60
n = 15
Answer: 35.3
Explanation: (-3-2-1+0+1+2+....27)/30 = 35.3
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
Or

On cross multiplication, we get
7x= 4.9× 2
7x = 9.8
Dividing both sides by 7, we get
x = 1.4.
<h3>Therefore, 1.4 pounds of nickel have to be used to create alloy that contains 4.9 lb of zinc.</h3><h3 />
So you know 50% means half right? So then do 32*2 and you get 64.