Find the final price of a 10 speed bike whose original price is 10% discount and 6% sales tax

Let x be the price of the bike:
He got 10% discount, so the net price after discount = x - 10%x= x - 0.1x

= 0.9x. On this amount he paid 6% taxes or taxes = (0.9x)(6%) = 0.054.x
The final price = 0.9x + 0.054.x = 0.954 x

Well you did not give enough information to get thr final price. But but I can show you how to create a formula for it and all you gotta do is plug in the value. You can use this method in the future.

Let's say the bike has original price of x. Well it is 10% off. to find a percentage of something we mutilply by the percentages decimal value. So 10% would be 0.1. So
10% of original price = 0.1 *x or 0.1x

we have to take this off since its a discount. so:
final before tax = x - 0.1x = 0.9x

Do do the same for the 6% sales tax, however, this one will be from the price after the discount because thats how taxes work. so find decimal value:
6% tax = 0.06 * (0.9x) = 0.054x

This this is added because it is taxed into price for the government's revenue. so we use the discounted final price plus the taxes:
final = 0.9x + 0.054x
final = 0.954x

Now you can plug in your original price and get answer