What is 7y+5+(3-y)= in a math problem

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.

Describe a situation where it would be beneficial to round decimals to the nearest dollar. explain why you would use rounding in that situation.

The daily production of a company is modeled by the function p = -w^2 + 75w - 1200. the daily production, p, is dependent on the number of workers (w) present. if the break-even point is when p=0, what are the least and greatest number of workers the company must have present each day in order to break even? 50 points! will give brainliest!