4.6 - 3.9= .7cm which is 7mm
Answer:
Jason has $58.20 and Jeff has $13.80.
Step-by-step explanation:
Let x represent the amount of money Jason has, and y represent the amount of money Jeff has.
We know that together they have $72. So, we can write the following equation:

We know that Jason has three <em>more</em> than four <em>times</em> the amount of money Jeff has. So:

This is a system of equations. We can solve it by using substitution. Let's substitute the second equation into the first. This yields:

Combine like terms:

Subtract 3 from both sides:

Divide both sides by 5:

So, Jeff has $13.80
We know that Jason has three more than four times the amount of money Jeff has.
Therefore, Jason has:

Multiply and add:

So, Jason has $58.20 and Jeff has $13.80.
And we're done!