Yis the midpoint of line segment XZ. The coordinates of Y are (6, 7) and the coordinates of X are (19, -16).
What are the coordinates of Z?
A (30, -7)
B (-4.5, 12.5)
C (12.5, -4.5)
D (-7, 30)

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.