The high school leadership team is having a car wash. they charge $5.50 for large cars and $4.00 for small cars . they had a successful day, washed a total of 142 cars, and made $652.50. how many large cars and small cars did they wash?

56 large cars and 86 small cars.

Step-by-step explanation:

Let's call:

: the number of large cars.

: the number of small cars.

Then, you can set up the following system of equations:

You can use the Elimination Method:

- Multiply the first equation by -4.0

- Add both equations.

- Solve for l.

≈

Substitute into one of the original equations and solve for s:

b.an increase in a causes b to decrease

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500