Δabc has three sides with these lengths: ab = 9, bc = 40, and ca = 41. what is the value of cos c? a. `9/41` b. `40/9` c. `40/41` d. ` 9/40`

Write each expression in exponential form and find its value.| ! 2 x 2 x 2 x 2

Which statement is not always true for a parallelogram? (a) opposite sides are congruent. (b) diagonals bisect each other. (c) it has 4 congruent angles. (d) consecutive angles are supplementary.

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]