One way to identlfy congruent triangles is to prove their matching sides have the same measure. triangle cde has vertices at (1,4), (1,1), and (5,1). graph triangle cde

Ineed i do not understand i'm only 8

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?