<em>apply the distributive law</em>
-xx * 2 - (-x) * 4
<em>apply minus-plus rules </em>
2xx + 4x
<em>apply exponent rule</em>
-2x² + 4x
<em>i hope this helps :)</em>
W= 34, thats what the answer is.
You are trying to find out how much one oz costs
2.50/5 = amount 1 oz cost
2.50/5 = .50
1 oz costs 0.50
hope this helps