50 point question on my profile by the way people.

solve algebraically:
(2x^3 − x + 1) + (3x – 5)

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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

What is the solution set of the quadratic inequality x^2-5< or equal to 0