5x²+13x-4-17x²-7x+19+15x²+5x-21x-7=
=5x²+15x²-17x² +(13x-7x+5x-21x) -4-7+19=
=3x²-10x+8
Answer:
The altitude is changing at a speed of 200 √3 km/hr
Step-by-step explanation:
Here, we want to know how far the altitude of the plane is changing
we are told that the airplane makes an angle of 60 degrees with the ground
So therefore , the rate of change of its altitude will be ;
sin 60 = x/ 400
x = 400 sin 60
x = 400 * √3/2
x = 200 √3 km/hr
Answer:
<em>I </em><em>hope</em><em> </em><em>this</em><em> helps</em><em> you</em><em>!</em>
<em>H </em><em>=</em><em> </em><em>1</em><em>,</em><em>4</em>
Answer:all of them
Step-by-step explanation:
