I need help thes quston. pleas help. show work not to much is apprecite if possible, thanks

4. {10 points) Curt can be paid in one of two ways for painting a house: Plan A: $500 plus 10 hours: Plan B: $300 plus 15 hours. Suppose a job takes x hours to oompiete. For what vaiues of x is pian B better for Curt? 5. {20 points) Find the answer: 1)1 3r7s1r2= 2) (- 419) is divided by (- HZ) =