Solve the problem.
-A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with $9 \%$ cement should he mix with 10 bags of $10.8 \%$ cement to produce a mix containing $10 \%$ cement?
A) 23 bags
B) 10 bags
C) 8 bags
D) 18 bags

Question

Quizplus · Accepted Answer

Let's assume the unknown quantity of bags with 9% cement as x.
Now, we can set up an equation based on the given information:
0.09x + 1.08(10) = 0.10(x+10)
0.09x + 10.8 = 0.10x + 1
Solving for x, we get x = 8.

Therefore, the contractor should mix 8 bags of pre-mix with 9% cement along with 10 bags of pre-mix with 10.8% cement to produce a mix containing 10% cement.

Solve the Problem 9%9 \%9% Cement Should He Mix with 10 Bags Of

Solve the Problem $9 \%$ Cement Should He Mix with 10 Bags Of