Answer:
The store should use 112.5 pounds of Brazilian coffee and 37.5 pounds of Colombian cofee.
Step-by-step explanation:
Let "b" be the amount of Brazilian coffee, in pounds, required for the blend and "c" the amount of Colombian coffee required, in pounds.
Since there are two unknown variables a two-equation system is needed to solve the problem, we can set up one equation for weight and another for price as follows:

Solve for "c" by multiplying the first equation by -10 and adding it to the second one:

Now, solve for b by replacing the value obtained into the first equation

The store should use 112.5 pounds of Brazilian coffee and 37.5 pounds of Colombian cofee.
Answer:
3x - 2y = -32
Step-by-step explanation:
Ax + By = C
2y = 3x + 32
-3x -3x
-3x + 2y = 32 (the leading coefficient needs to be positive)
-1(-3x + 2y = 32)
3x - 2y = -32
Hope this helps!
Answer:
x = 6
Step-by-step explanation:
Answer:
22
Step-by-step explanation:
0.8 --> 1 * 22 = 22
Hope this helped! Have a nice day!