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:
1. 10x + 14
2. 2x + 11y - 7
3. -10x - 11
Step-by-step explanation:
1.

2.

3.

Answer:
in triangle MNO
relationship between perpendicular and hypotenuse is given by sin angle
sin64°=p/h=70/x
x=70/sin64°=77.88foot
length of MN to the nearest tenth of a foot.
=78ft
Answer:
y-5=-3(x-10)
Step-by-step explanation:
y-y1=m(x-x1)
y-5=-3(x-10)