What is -7+(-2)? i got nine but i'm not sure if that's correct.

How do i do this? i don’t understand

20 points 1. your friend, taylor, missed class today and needs some identifying solutions to systems. explain to taylor how to find the solution(s) of any system using its graph. 2. taylor graphs the system below on her graphing calculator and decides that f(x)=g(x) at x=0, x=1, and x=3. provide taylor some feedback that explains which part of her answer is incorrect and why it is incorrect. f(x)=2x+1 g(x)=2x^2+1

In triangle abc, angle c is a right angle. find the value of the trig function indicated. find tan a if c = 17 and a = 8