4. Explain how the graphs of the functions are similar and how they are different 2x+3y=1470
And
2x+3y=1593

they are parallel lines so have the same slope.   Difference would be the where they intersect the x and y axis

Step-by-step explanation:

22 pounds of coffee of type A were used.

Step-by-step explanation:

Given:

Cost of type A coffee is $5.95 per pound, and cost of type B coffee is $4.05 per pound.

A total cost of $398.20 of type A coffee and type B coffee is used in this month.

Now, to find the quantity in pounds of type A coffee were used.

Let the pounds of type A coffee be

According to question, type B coffee used is three times as type A.

So, the pounds of type B coffee used is

Now, to get the pounds of type A coffee were used we put an equation:

Dividing both sides by 18.10 we get:

Therefore, 22 pounds of coffee of type A were used.