Solve for d and find the area please

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

What is the missing constant term in the perfect square that starts with x^2 -20x

The table respent two linear functions the equation respented by the first tables is given