Final answer:
The yearly income for Jacob and Carlos is given by expressions. Setting the two expressions equal to each other and solving for x will determine when they earn the same amount of money.
Step-by-step explanation:
The problem states that Jacob's yearly income is given by the expression 2000x + 6000, where x is the number of hours he works each week. Carlos' yearly income is given by the expression 3800x - 39000. The manager predicts that if both Jacob and Carlos work 38 hours, they will earn the same amount of money.
To solve this, we can set the two expressions equal to each other and solve for x:
2000x + 6000 = 3800x - 39000
Subtract 2000x from both sides:
6000 = 1800x - 39000
Add 39000 to both sides:
45000 = 1800x
Divide both sides by 1800:
x = 25
Therefore, if Jacob and Carlos each work 38 hours, they will earn the same amount of money.