a math test is worth 100 points and has 30 problems. Each problem is worth either 3 points or 4 points, how many 4-point problems ate there?

Respuesta :

Answer:

13

Step-by-step explanation:

100 total points

3     4

9    8

12   12

15   16

18 20

21   24

24   28

27  32

30  36

33      40

36    44

39   48

42   52

45

48