Can some some me with 3 variable system of euqtions -6r+5s+2t=-11; -2r+s+4t=-9; 4r-5s+5t=-4

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5