Answer:
75.2
Step-by-step explanation:
6(1/4b+10) + 4(9/10b+3)
6/4b + 60 + 36/10b + 12
3/2b + 60 + 12/5b + 12
3/2b + 12/5b + 60 + 12
5b × 3 + 2b × 12/ 5b × 2b + 72
15b + 24b/10b + 72
39b/10b + 72
3.2 + 72 = 75.2
