Solve each problem by graphing

-6x+4y=-12
y=-3

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled