16. Which of the following best describes the graph of a quadratic equation with
one real root?
F It has two x-intercepts.
G It does not cross the x-axis.
H Its vertex lies on the x-axis.
J Its vertex lies on the y-axis.

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.