Your dad wants to go to the gym to exercise. He plans to swim every three days, jog every
4 days, and lift weights every five days. Your
dad does all three of these activities today.
When will be the next time that he does all
three activities on the same day? Is the
problem about GCF or LCM?

if you mean

then it's c. 8, -7/3

but if you mean

then it is

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

if she was to only spend a dollar she can get 1lb

step-by-step explanation:

whats the rest of it?