Y=−2x+7 and y=0.5x−5.5 point of intersection

(5, -3)

Step-by-step explanation:

Substitute -2x + 7 for y in the 2nd equation, and then solve the resulting equation for x:

-2x + 7 = 0.5x - 5.5

Combining like terms, 2.5x = 12.5, or x = 5.

Subbing 5 for x in the first equation, we get:  y = -2(5) + 7 => y = -3

The solution is (5, -3)

The chart below shows Mrs. Thompson's grocery bill. What is the average amount Mrs. Thompson spent on groceries?

A. $58

B. $68

C. $78

D. $340