A college student completed some courses worth 3 credits and some courses worth 4 credits. The student earned a total of 59 credits after completing 18 courses. how many courses worth 3 credits did the student complete? 5

13

20

39

Answer

13

Step by Step Solution

The answer is 13 because 13*3 = 39. 20 is impossible because that would total 60 credits. 5 isn't possible because then there would be no way to get 9 in the digits place.

answer: 1) twenty-seven times y

              2) twenty-seven multiplied by y

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)