Question

Coffee cafe makes 90lbs of coffee that costs $6 per lb. the types of coffee used to make this mixture cost $7 per lb and $4 per lb. how many lbs of the $7 per lb coffee should be used in this mixture?

Answer 1

to solve a mixture problem, I set up a table with the 1st two rows are the ingredients the 3rd row is the mix


amt cost/lb total cost
4
7
mix 90 6

this is the infor from the problem

Answer 2

amt cost/lb total cost
90-x 4
x 7
mix 90 6

Answer 3

Is the answer 30 lb, 40, 50 , or 60 lbs

Answer 4

now mult across
amt cost/lb total cost
90-x 4 360 - 4x
x 7 7x
mix 90 6 360


equation is
360-4x + 7x = 540

now just solve for x

Answer 5

So the answer is 60 lbs right ?

Answer 6

right!