Select the proper inverse operation to check the answer to 25 − 13 = 12.

a. 12 + 13 = 25
b. 12 ÷ 25 = 13
c. 12 × 25 = 13
d. 12 × 13 = 25

Nine more than four times a number is the same as one less than twice the number. find the number?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

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.