There are 2820 cars in farmington. the ratio of medium size cars to compacts is 7 to 5 and the ratio of compacts to full-size cars is 8 to 9.how many full-size cars are there?

Number of full size cars = 900

Step-by-step explanation:

The ratio of medium size cars to compacts is 7 to 5 and the ratio of compacts to full-size cars is 8 to 9. Since compact cars are  there in both ratios , we need to  make the number in the ratio for compact cars to be the same.

Multiply by 8 on numerator and denominator

Multiply numerator and denominator by 5.

Ratio of medium, compact and full size are in ratio 56,40,45.

Total number of cars =2820.

(56 + 40 + 45)x = 2820

x =

x = 20

Number of full size cars = =900

the amount you'd have after the work is $1.55

step-by-step explanation:

you subtract 95% from $31.

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w