Basically just substitute t+2 for every x
f(t+2)=3(t+2)+9
f(t+2)=3t+6+9
f(t+2)=3t+15
Idk where the square roots are supposed to come from tho
15/20 in it's simplest form is 3/4. You have to divide by 5. 15 divided by 5 is 3 and 20 divided by 5 is 4. Hope i helped. Have a nice day.
(1.9 x 10^5)^3 = 1.9^3 x 10^15 = 6.859 x 10^15
Unlikely
Impossible
Equally likely
Likely
Certain
1200 parts/ 400 parts = 3
12 parts x 3 = 36 parts
In 1200 parts, 36 would be bad.