Let the amount Tom does = x
Then Larissa’s time would be 3x( 3 times the amount of Tom)
And Neal would also be 3x
The total of the 3 is 84 hours so as an equation you have:
X + 3x + 3x = 84
Combine like terms
7x = 84
Divide both sides by 7
X = 84/7
X = 12 hours
Tom = x, so Tom exercised for 12 hours.

Both the numerator and denominator are continuous at

, which means the quotient rule for limits applies:

Perhaps you meant to write that

instead? In that case, you would have
Answer:
2/10 or in its simplest form 1/5
Step-by-step explanation:
there is 2 grey marbles so 2/10 (there is 10 marbles altogether)
so half of 2 is 1 and half of 10 is 5
so the answer is 1/5