Solve the equation 10r – 2 = 28 for r. A.-1B.1C.3D.5

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?