D because y (time spent) = 50 × x (distance travelled)
225÷4.5=50
x÷y=50
As what you gave we have:
(3+4)n-2=7n-2
Answer: 18.
Explanation: Make a table of the multiples of 9 and 6. You will see that the lowest multiple they share is 18. This would mean 5/6 is now 15/18 and 7/9 is now 14/18
Dude y you even as its just the surface area you just use the formula