HHHEEEL RR Holden is trying to determine the velocity of his race car. He went 20 meters east, turned around, and went 40 meters west. His car was 20 meters from the starting line. This took 5 seconds.

What is the car’s average velocity?

4 m/s east
4 m/s west
12 m/s west
12 m/s east

4 m/s west

Step-by-step explanation:

Because he went only 20 meters east and then went 40 meters west, he would be going west. Then when you divide the displacement, which you get by subtracting the 2 numbers, by 5 seconds, you get 4 m/s. I'm sorry if I'm wrong.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

2

step-by-step explanation: