Choose all of the following equations that have a vertex that is the maximum point of the parabola. more than one answer may be chosen.

y = −4x2 + 8x − 19
y = 3x2 + 9x − 4
y = 8x2 − 6x + 128
y = −x2 − 7x + 1

The answers are (a), y = −4x^2 + 8x − 19 and (d), y = −x^2 − 7x + 1. Because the 'a' value in both these equations is negative, the parabola opens downwards, meaning the vertex would be the highest or maximum point.

Lol english

Yea they are simplyfiy the ratios