What is the vertex and the equation of the axis of symmetry of the graph of y=x²-6x-7?

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11