Figure ABCD is transformed to figure A’B’C’D’, as shown

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

What percent of 18 is 24? and plz explain thx.

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.