1. The universal set is the set of all objects under consideration. Find all solutions to the equation x^2 =25. Assume the universal set U is a) u= {0,1,2,3,...}
b)U={...,-3,-2,-1,0,1,2,3}
c) U= {2,4,6,8,9,...}

Im not 100% what its wanting me to do, I would just like to understand it and know how to do it.

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.

The table shows the number of hours orlando spent at football practice last week. select the appropriate numbers below to complete the model to find the number of hours orlando spent practicing on tuesday and friday.

Solve 17= -13 - 8x and show your work.