The function c(t)=400+30tc(t)=400+30tc, left parenthesis, t, right parenthesis, equals, 400, plus, 30, t models the number of classrooms, ccc, in the town of sirap, ttt years from now. the function d(t)=25+td(t)=25+td, left parenthesis, t, right parenthesis, equals, 25, plus, t models the number of students per classroom, ddd, ttt years from now.

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → d

7

step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!