If
cos
⁡
θ
=
4
27
cosθ=
27


4

and angle
θ
θ is in Quadrant I, what is the exact value of
tan
⁡
2
θ
tan2θ in simplest radical form?

Agiven line has the equation 2x + 12y = −1. what is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (0, 9)? y = ( )x + 9

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827