If ABC is a straight line and angle CBD=119
work out the value of x

Find the x-intercept and y-intercept of the line. 3x + 5y = −15

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.