Jamaal has 20 models of planes and cars. He has three times as many cars as planes. What is the ratio of his cars to total models? 1/4 3/1 3/4 4/3

3/4

Step-by-step explanation:

If  Jamal has 3 times as many cars as  planes then we could represent it by the equation   x + 3x = 20  where x is the number of planes  and 3x is the number of cars.

x+ 3x =20   solve for x

4x = 20

x = 5    

Number of planes  =  5

Number of cars   =  3(5) = 15  

Now the ratio of his cars to the total model will be    which reduces to 3/4.

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy

inch

step-by-step explanation:

yard and mile are too big.