Algebra 1
posted by KATIE on .
You are making up your own mix of concrete to patch a set of stairs. In order to have the proper mix, you need to mix 1 part of Portland cement with 2 parts of sand and 3 parts of gravel.
A. How many total parts are in one batch of concrete?
B. You make a mix with 4 parts of sand. How many total parts of cement, sand, and gravel are in your mix?
Is A:6
and
B:12

Right.