you're just trying to get the r alone. so you have to subtract the 8 and multiply the nine. you're just reversing the problem.
Answer: 15 dollars per hour
If she works for 2 hours each night for 10 nights then she is working for 20 hours total. 300 divided by 20 equals 15
The answer would be 24 1/2 miles.
If she walks 3 1/2 miles everyday for one whole week, you would multiply 3 1/2 by 7 for each day of the week that she walks so 3 1/2*7 = 24 1/2.
Hope this helps :))
we have a number of two digits, ab.
The tens digit is a. the unit digit is b.
We know that:
a = 3 + b
b = r.
We can replace the second equation in the first one, and get:
a = 3 + r.
Then we have that our number is:
(3 + r) for the tens digit, and r for the unit digit.
Now, remember that the maximum possible digit is 9.
then the maximum possible value of r comes from.
3 + r = 9
r = 9 - 3 = 6.
Then the possibles values of r are: 0, 1, 2, 3, 4, 5 and 6.