1970 and 4775! Both are divisible by 5!
We can use a factorial for this:
4! = 4*3*2*1 = 24
There are 24 combinations of 4 numbers.
Answer:
x1=-2, x2=2
Step-by-step explanation:
1/9 * 54/1 = 54/9.
So she is walking 6mph.
Let's call the original amount of money x.
We know that she has 2/5 of the original amount left, and that this is equal to $15.
Therefore, 2/5(x) = 15, and x = $37.50.