Answer:

Step-by-step explanation:
Given that
are in AP
To prove:
are in AP
From given as we know if p , q, r are in AP then 2q= p+r.

Now

Which is the result of AP
.
Hence proved
Answer:
y = 2x-5
Step-by-step explanation:
y = 2x+2
We know the slope of this line is 2 because it is in the form y =mx +b where m is the slope
We want a parallel line so it has the same slope
We can use the point slope form of the equation
y-y1 = m(x-x1)
y--1 = 2(x-2)
y+1 = 2(x-2)
Distribute
y+1 = 2x-4
Subtract 1 from each side
y+1-1 = 2x-4-1
y = 2x-5
This is in slope intercept form
a^2 + b^2 = c^2
9^2 + 7^2 = get the answer then find the square root of it