
Quadratic formula is

'a' is the coefficient of x^2 = 4
'b' is the coefficient of x = 2
'c' is the constant = -1
Now we plug in all the values in quadratic formula



The above one is the substitution of values of a,b,c in quadratic formula.
Your answer is gonna be the second one!
Well this isn't college math lol
You do 19x + 13x + 4x = 26x
180 divided by 26x = x = 6.92307...
plug in x then round to tenth
6.9 x 19 = 131.1 degrees
6.9 x 13 = 89.7 degrees
6.9 x 4 = 27.6 degrees
Answer:
m= 4/3
Step-by-step explanation: