A + b + c = 180
a = 2b
b = c + 4
Substitute the b equation into the a equation
a = 2(c + 4)
a = 2c + 8
Substitute equations a and b into the first equation
2c + 8 + c + 4 + c = 180
4c = 168
c = 42
Find the other angles using c
b = 42 + 4
b = 46
a = 2(42) + 8
a = 92
Therefore angle a is 92 degrees, angle b is 46 degrees, and angle c is 42 degrees.
What do you need help with?
Answer:
d) 4
For the second question, just plug in the x value and isolate the y value
Step-by-step explanation:
1. 9y=36-13x
y=4-13/9 x
4 is the y-intercept
X - 6 = -5
If we add 6 to both sides we get:
X - 6 + 6 = -5 + 6
X = 1
