15 : 5 = 3$
Total cost : quantity = single cost
Given:
The number of teeth = t = 25
The gear is driven by a 10-tooth driver gear (T) at 250 RPM
Let the speed = s
So, using the ratio and proportion

Solve for s:

So, the fear will be driven by 625 RP
Answer:
A
Step-by-step explanation:
Answer:
4y-9
Step-by-step explanation:
y is the number, 4 times the number = 4y
so 4y-9