How many miles are there in 10 kilometers? Hint: there are 1.61 kilometers in a mile. 3. If you run a 10 kilometer race in 42 minutes 42 seconds, what is your average pace (time per
mile in minutes and seconds)? What is your average speed in miles per
hour?

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

the answer is d

step-by-step explanation:

answer: your correct answer is b. d.

step-by-step explanation: