SOLUTION:
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 4% cement should he mix with 10 bags of 11.6% cement to produce a mix containing 8% cement?
Algebra.Com
Question 112754:
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 4% cement should he mix with 10 bags of 11.6% cement to produce a mix containing 8% cement?
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
10*.116+.04X=.08(10+X)
1.16+.04X=.8+.08X
.04X-.08X=.8-1.16
-.04X=-.36
X=-.36/-.04
X=9 BAGS OF 4% CEMENT.
PROOF
10*.116+.04*9=.08(10+9)
1.16+.36=.08*19
1.52=1.52
RELATED QUESTIONS
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 4% (answered by Edwin McCravy)
a contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 11%... (answered by checkley77,nerdybill)
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 6%... (answered by nerdybill)
a contractor mixes concrete from bags of pre-mix for small jobs. how many bags with 6%... (answered by stanbon,richwmiller)
Please help.
A contractor mixes concrete from bags of pre-mix for small jobs. How many (answered by richwmiller)
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 7%... (answered by Fombitz)
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 8%... (answered by nerdybill)
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 8%... (answered by richwmiller)
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 10%... (answered by nyc_function,modi.kk91)