-[Help Me Please]-

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

43lbs of tomatos cost $387. how much would 41lbs cost

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points