1) 2 + 4 + 6 + . . . + 2n=n(n+1)

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)