HELP PLEASE I NEED IT ASAP! Consider the System of equations:

5x- 2y = 16
15x- 7y = 51

Multiply the first equation by some constant, so that in the resulting equation, the coefficient of x matches the coefficient of x in the second equation.

Enter the entire equation that results from multiplying the first equation by the constant.

1. X3,    15x - 10y = 80   15x - 7y = 51

-17y = 29

y = -1.70588235294

Step-by-step explanation:

rest is up to you

h = 221.7 m

Step-by-step explanation:

It is given that,

An observer (O) is located 400 feet from a building (B). The observer notices a kite (K) flying at a 29° angle of elevation from his line of sight. We need to find how high is the kite flying over the building?

The attached figure shows the whole scenario. It means we need to find the value of h.

Using trigonometry as follows :

So, the bird is flying at a height of 221.7 m over the building.