█ Explanation <span>█
Let's call the missing altitude 'x'.
</span><span>✦ To find the plane's altitude, find the tan of 30 degrees. The side opposite is going to be x, while the side adjacent is going to be 4.4 miles.
</span>✦

✦

✦

✦

✦

<span>✦ We usually write altitude in feet.
</span>
Answer: 2.54 * 5280 ~ <span>
13,400 ft
</span><span>Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia</span>
Work is provided in the image attached.
Answer:
the perimeter of a square is 4a.. where (a) is one side
therefore the equation formed is
3.5x(4)=2x+54
14=2x+54
2x= -40
x= -20
Answer:
x= 1
Step-by-step explanation:
7x-4x= -1+4
3x = 3
x= 1