Prove line a is parallel to line d using transformations.

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?

2-digit numbers less than 91 which are 1 less than a multiple of 10

225/100 of last years cost. write each fraction as a decimal and as a percent