A College student completed some courses worth 4 credits in some courses are worth 5 credits. The student and a total of 74 credits after completing 17 courses. How many courses worth 4 credits to the student complete

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.

Using the rise/run rule. you would get 2/6.simp. 1/3