Rewrite the trigonometric expression in the form y = a cos(bx).
y=-cos(4x/5)

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle