He worked 9 hours in his first job and 5 hours in his second
Answer:
3x + 12
Step-by-step explanation:
Use the distributive property.
3(x + 4) = 3 * x + 3 * 4 = 3x + 12
Answer: 3x + 12
x=2.5
5x = 5(2.5) = 12.5
I believe 12.5 is the answer
Answer:
6/7
Step-by-step explanation:
18/21 dollars is simplified when you divide the fraction by 3 on each number. So you get 6/7 of her money was spent.
A rational number is a number that can be written in the form:

Where p and q are coprimes. We are asked for finite sets, we can rule out options 3 and 4. In the set in option 2 the first element is:

This number cannot be written a ratio. We can rule out option 2.
All the elements in the set from option 1 can be written in the form p/q.Thus, the answer is the first option.