Answer:
a = 70t + 600
b = 35t+ 950
high school a will have 140 more students than high school b in 14 years.
Explanation:
high school a already has 600 students, so we keep that the same. because the school will grow by 70 students each year, and we want to know how many there will be in 14 years, so we have to multiply 70 by 14 to get 980. add 980 to the preexisting population of 600 students, and we end up with a total of 1,580.
high school b already has 950 students, so we keep that the same. the school is projected to grow by 35 students per year, and we need to know how many there will be in 14 years, so we multiply 35 by 14 to get 490. add the 490 new students to the current population of 950 students to get a total of 1,440.
high school a has a higher projected population, so we subtract high school b's population of 1,440 from high school a's population of 1,580. we find that in 14 years, high school a will have 140 more students than high school b.