Hot air balloons are able to fly at a very high altitudes a world record height of 64997 feet was set in 1988 in 2005 a new record of 68986 feet was set how many feet higher was 2005 record than the 1988 récord first draw a diagram to show the parts of the problem

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

36

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.