X + y = -3 standard form

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog