Question

Martina's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Martina
$5.90
per pound, and type B coffee costs
$4.80
per pound. This month's blend used twice as many pounds of type B coffee as type A, for a total cost of
$511.50
. How many pounds of type A coffee were used?

Answer 1

@ksanka

Answer 2

@jigglypuff314

Answer 3

from the given information you can get the two equations
2A = B
and 5.9A + 4.8B = 511.5

Answer 4

@jigglypuff314 what's next?

Answer 5

a=−0.81355932b+86.69491525

Answer 6

we can plug in the first equation into the second equation and get
5.9A + 4.8(2A) = 511.5

can you solve for A from there?

Answer 7

yes

Answer 8

what would you get? :)

Answer 9

33

Answer 10

there you go ^_^