Answer:90
Step-by-step explanation:
My reasoning is because it makes a right angle and a right angle is equivalent to 90 degrees
a+b+c=-1
a=1
b=-1
c=-1
So for this u just replace the letters
not sure about x+y=7
Answer: the answer is 119$
Given:

Point = (8, 4)
To find:
The slope-intercept form of the equation of the line.
Solution:

Slope of this line =
.
Slope of the line is same as the slope of
.
Slope of the line (m) = 
General form of line:
y = mx + b
---------- (1)
It contains the point (8, 4). Substitute x = 8 and y = 4 in (1).


Subtract 4 from both sides, we get
b = 0
Substitute b = 0 in (1).
Equation of the line:


<u>Complete the sentence:</u>
; I used the general form of a line in slope-intercept form, y = mx + b. The slope, m is
. Then I substituted 8 for x and 4 for y into the standard form and solved for b, which is 0.