Answer:66.3
Step-by-step explanation: you multiply 12.5 times 5.3 and the round to the nearest tenth
Let
n-------> the number of nickels
q------> the number of quarters
we know that

so
----> equation A
----> equation B
substitute equation B in equation A
![0.05n+0.25[3n]=1.60](https://tex.z-dn.net/?f=0.05n%2B0.25%5B3n%5D%3D1.60)



Find the value of q

therefore
<u>The answer part a) is</u>
the number of nickels are
and the number of quarters are 
<u>the answer Part b) is</u>
The expressions that represents the number of quarters is
You can't really make it easier to add, but since the (8+25) is in parentheses you should add that first
52 + 33
Then add straight away
52 + (8+25) = 85
How you would solve it is by 8 multiplied by 4.
The formula B*H
So the answer is 32cm squared.