Two variables vary inversely if their product is constant (does not change). The variables w and t vary inversely so their product wt = k were k is a constant. Solving this for t we get t=k/w
We are told that w = 4 and t = 1/5 so we know their product wt = (4)(1/5) = 4/5. This is what I called k before.
Therefore the relationship between w and t can be modeled by t = (4/5) / w. That is, t = 4 / 5w
Further, when w = 9, we find t by substituting 9 for w in the equation just found and obtain: t = 4 / [(5)(9)] = 4/45. That is, when w = 9, t = 4/45.
This mean choice D is the correct answer.
Step-by-step explanation:
option A (2)
thank you !
hope it helps
When n increases by 1, a_n increases by 7—the multiplier of n in the explicit formula.
The appropriate choice is
A. 7
First off, if it's mixed, you'd want to convert it to "improper" first, and then do the division... say hmm - 3 and 1/7
the line over the decimal part is because is a "recurrent decimal", or repeating one.
The answer is -1 because of y2 -y1÷ x2-x1 which equals your slope
