How do i simplify this expression using like terms?

3x+9x

Our goal is to collect email addresses from 60% of customers who purchase a product." so that means if i talk to 95 customers, i need to persuade to provide an email address?

The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply