General solutions of sin(x-90)+cos(x+270)=-1
{both 90 and 270 are in degrees}

Aline parallel to a triangle's side splits ab into lengths of x - 5 and x + 2. the other side, ac, is split into lengths of x and x + 12. what is the length of ac? a) 12 b) 24 c) 36 d)

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25