1. Level 3: Use appropriate mathematical strategy to find which term of the sequence
21, 18, 15, ... will be -81. Also, find the first negative term of this bequence.

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?