State sales tax y is directly proportional to retail price x.
an item that sells for 150 dollars has a sales tax of 12.32 dollars.

find a mathematical model that gives the amount of sales tax y in terms of the retail price x.
what is the sales tax on a 260 dollars purchase?

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

How to simply and write the answer n a whole number

Factor and solve to find roots x squared -x - 90 =0