To approach a runway, a plane must begin a 7° descent starting from a height of 3 miles above the ground. to the nearest mile, how many miles from the runway is the airplane to start the approach?

Step-by-step explanation:

It is given that to approach a runway, a plane must begin a 7° descent starting from a height of 3 miles above the ground.

Thus, we have AB=3 miles and ∠C=7°.

Using the trigonometry, we have

⇒

⇒

⇒

⇒

Thus, From 24.6 miles the runway is the airplane to start the approach.

y = - 6

step-by-step explanation:

given the point (- 2, y) lies on the graph then it is a solution of it's equation.

substitute x = - 2 into the equation for value of y

y = 3(- 2) = 3 × - 2 = - 6

the point on the graph is (- 2, 6)

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk