Solve the system by substitution.
-2x - 3y = -8
-y = x

Pls! does anybody know a shortcut for answering these types of questions in the future?

True or false? a circle could be circumscribed about the quadrilateral below.

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?