## _TylerTaughtMe 3 years ago Part 1: Write an expression for the following real-world situation. If Mr. Jackson earns $1000 for every used car he sells and$2000 for every new car he sells, how much would he make if he sold "u" used cars and "n" new cars? Part 2: Write a real-world situation of your own and a VARIABLE expression to go with it.

1. tjones89

for this problem we'll start by making two equations, one that represents money made from used cars, and another that represents money made from new cars

2. _TylerTaughtMe

Ok

3. tjones89

so for every used car that Mr J sells he makes $1000, so if he sells two used cars he will make two times that amount, if he sells three he will make three TIMES that amount, so if he sells u amount of cars, he will make u times$1000

4. tjones89

so our first equation looks like this (number of used cars) times $1000 = amount of money made 5. tjones89 making sense so far? 6. _TylerTaughtMe Yess 7. tjones89 good so our second equation is the same thing but with new cars, the number of new cars times$2000 equals the amount of money he makes (number of new cars) x \$2000 = amount of money made from new cars

8. tjones89

so we have two equations $u \times 1000 = m1$ and $n \times 2000 = m2$

9. tjones89

you see ive inserted variables, that make sense?

10. _TylerTaughtMe

Yess It Makes Sense

11. tjones89

ok so now we need to make a third equation, m1 + m2 = T (amount of money from used cars) + (amount from new cars) = (total amount of money)

12. tjones89

we then substitute the first two equations into the third to make (u x 1000) + (n x 2000) = T

13. tjones89

and that's your equation, does that make sense?

14. _TylerTaughtMe

Yea It Dose !

15. tjones89

yay

16. tjones89

do you want help with the next part?