What is the simplified form of x + 6 / 3 - x + 2 / 3

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

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?