2) Evaluate the following algebraic expression: - 2n + n ​ when n = 5n 2Show your work:

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

State if the two triangles are congruent. if they are, state how you know?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling