What is the difference between px+q=r and p(x+q)=r

The deck that kenneth is building is in the shape of a parallelogram abcd the measure of angle c is one third the measure of angle b find the measure of each angle of the deck

What is the area of the triangle 10 13 12

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.