what is the vertex of the quadratic function: f(x)=-4x²+2x+4? and what are the x intercepts?​

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Multiply. write your answer in simplest form. 3/8 x 5/7