How do you find tan (-7 pi/2) without using a calculator and what would the answer be?

Solve the inequality and graph 6j - 7 < 5

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.