Please help! Select the expressions that are polynomials. x^2/7+1
x^-3+4x
-2x^3+2x+4
6x-x^3+4x^2
Thank you!!

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules