Answer:
13 is the number.
Step-by-step explanation:
Given:
Twice the difference of a number and 9 equals 8.
Let the unknown number be 'x'.
Therefore, as per question:
The difference of 'x' and 9 = 
Twice the difference means 2 times the difference. So, we multiply 2 to the difference. Therefore,

Now, the above expression is equal to 8. So, we equate the above expression to 8. This gives,

Solving for 'x', we get:
Using distributive property of addition and distributing 2 inside the bracket. This gives,

Therefore, the unknown number is 13.
Now, we can verify our answer.

Therefore, the answer is correct.
All fractions start out of 100.
2/100
1/50
So the simplest form is 1/50
:)
Answer:
6 1/2 minutes
Step-by-step explanation:
9 9/10 = 9.9
3 3/5 = 3.6
9.9 + 3.6 = 13.5
13.5 = 13 1/2
20 - 13.5 = 6.5 = 6 1/2
Answer:
.36 miles in one hour. sorry if I'm wrong.