we are given equation of line

Equation of perpendicular line:
Firstly , we will find slope of line

we can compare it with
y=mx+b
we get

we know that
slope of perpendicular line will be -1/m
so, slope is

It passes through point (-4,5)
so, we can use point slope form of line

we get
..........Answer
Equation of parallel line:
Firstly , we will find slope of line

we can compare it with
y=mx+b
we get

we know that
slope of parallel line always equal
so, slope is

It passes through point (-4,-5)
so, we can use point slope form of line

we get
............Answer
If you take 180-90 because of the right angle would be 90° then -15 you will get 75 which will be X
Answer:
Step-by-step explanation:
the 3rd one
In equation 1, When x = 0, y = -3 ( 0, -3)
And when y = 0, x = -3....( 3,0)
In equation 2, when x = 1, y = -4(1,-4)
and when y = 2, x = 5....(5,2)
You have to plot the points on graph paper and the solutions are where the two lines intersect.
You can use any points for x and y.