Answer:
141 5/7
Step-by-step explanation:
8c + 10b ÷ 7a
Let c = 7, b = 12, and a = 5
8*7 + 10*12 ÷ 7*5
Multiply and divide from left to right
56+120 ÷7*5
56+ 600/7
Get a common denominator
392/7 + 600/7
992/7
Change from an improper fraction to a mixed number
141 5/7
If Yoshi has 8 per pack and used 7 he would have 32 markers in all and bought 3 packs and had an extra marker
I think the answer would be 1.
Relative frequency is the number of times that the train is late between the total of journeys, so only multiply 0.15*100 =15 times
