Which equation is equivalent to the formula below?
y = a(x – h)2 + k

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

The system of equations graphed below has how many solutions?

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?