Triangle ABC has the measures of 10cm, 5 cm, and 15cm. Is it a right triangle?

Daniel expanded the expression as shown below -2(-8x-4y+3/4)=-10x-8y-11/4 what errors did he make? check all that apply

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?