An expression for the perimeter of the shape is below

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

26) -2(7x) = (-2 • 7) x a. associative property of addition b. associative property of multiplication c. commutative property of multiplication d. commutative property of addition

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8