On his first three tests, justin scored 99, 93, and 86. what score must he get on his fourth test to have an average (mean) of
80 for all four tests?

hi

Step-by-step explanation: uhh you are correct hope i can bring up your confidence for the finnal test if you have one

no answer just a guess

Step-by-step explanation:

I believe it would have to be an 83

in order to average it out

The general vertex form of the a quadratic function is y = (x - h)^2 + k. In this form, the vertex is (h,k) and the axis of symmetry is x = h. Then, you only need to compare the vertex form of g(x) with the general vertex form of the parabole to conclude the vertex point and the axis of symmetry. g(x) = 5(x-1)^2 - 5 => h = 1 and k = - 5 => theis vertex = (1, -5), and the axis of symmetry is the straight line x = 1. the vertex is (1,-5) and the symmetry axis is x = 1.