Mathematics
Grade10
Easy
Question
A sporting goods store is running a summer sale on its surfboard. Kayden is interested in a surfboard. The store is offering a $ 50 instant rebate, as well as a 10% discount. Write functions to model the discounts.
- x - 50 , 0.9x
- x + 50 , 0.1x
- x - 50 , 0.1x
- x + 50 , 0.9x
The correct answer is: x - 50 , 0.9x
Given that the store is offering a $ 50 instant rebate, as well as a 10% discount. We need to find the functions to model the discounts.
Let the cost of surfboard be $ x.
When $ 50 instant rebate is only applied.
f(x) = x - 50
When 10% discount is only applied.
g(x) = x - 10% of x = x - 0.1x = 0.9x
Therefore the functions to model the discounts is f(x) = x - 50 and g(x) is 0.9x.
