Pls help only if you know this in giving correct answer BRAINLIEST!

Solve the equation for all real solutions in simplest form.

4n^2-19n+18=0

What are the soultion(s) to the quadratic equation 40- x^2=0

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y