Can someone help me with all these questions please!! it’s very annoying when people just put something for points ... if u don’t know, don’t answer !

Step-by-step explanation:

15) tanA = 6.8/3.0

16) tanR = 9/24

17) tanB = 16/17

18) BC = 10tan40

19) PQ = 38/tan75

20 BC seems to be missing some of its length number I will call it 14

redo if that is incorrect.

∠A = arctan(14 / 14.5)

∠C = arctan(14.5 / 14)

answer: (1,3) (3,-1) (5,-5) ?

step-by-step explanation:

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)