In your notebook, set up the following addition using a vertical format and find the sum of the given polynomials.

2mn + 4n^2 and 5m^2 - 7mn

a. 9m^2 + 9mn - 4n^2
b. 5m^2 - 14mn - 4n^2
c. 5m^2 - 5mn + 4n^2
d. 5m^2 + 5mn - 4n^2

i need to know how to do it and the answer. any number following a ^ is an exponent.

3. solve the given inequality and graph the solution on a number line.

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9