What two ratios have a unit rate of 1:2

The parking lot of a store has the shape shown. all angles are right angles. what is the area of the parking lot?

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.