PLEASE HALP IT'S LATE AND I GOT A ZERO UNTIL I FINISH T^T

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.

Write the percent as a fraction or mixed number in simplest form. 0.8%