Answer:
He will be unable to tell whether a difference in exercise preference is related to a difference in age or to a difference in weight
Step-by-step explanation:
age could be a factor to exercise as well as weight so both affect the outcome so he has two samples
Variables can be used to represent unknown numbers in a equation or expression that you will later find out what they are
Firsst you would take 46 and minus it from 73 that gets you 27. then you want to take the number of hours she worked and dived that by 6 and that gets you 4.50
3x²–243=0 —> 3 (x²–81) = 0 —>
x²–81=0 —> (x-9)(x+9)=0
x-9=0 —> x=9
x+9=0 —> x=–9
I hope I helped you^_^
