D(Pumpkin)
You have to first find out the ratio of the different plants
Tomato:Pepper:Squash: Pumpkin: Total
= 88:44:33:66:231
Divide 231 by 77 =3
This means that the original number of plant is also 3 times of 22, as the ratio and proportion of this plant out of the total number of plant will be the same.
Hence you multiply 22 with 3 to get 66, which is the original number of pumpkin plants.
1 ) Billy walks 15 miles every day to soccer practice and he had 5 practices last week.
We know that, 1 mile = 1760 yards
So, 15 miles = (15× 1760) yards = 26400 yards
Thus the total distance walked in 5 practices will be: 
2) Mark's current age is
years
So, his age was in 10 years ago 
Given that, his current age is 3 times his age 10 years ago.
So, the equation to represent this situation will be : 