Question

a red kite is 100 ft off the ground and is rising at 8 ft per second. a blue kite is 180 ft off the ground and is rising at 5 ft per second. how long will it take for the red kite to be higher than the blue kite? round your answer to the nearest second. (show work, please!)

Answer 1

is this calculus?

Answer 2

no, algebra 1. or pre-algebra.

Answer 3

Trial & Error would work although I don't think that's the kind of work you want to see.

Answer 4

So... I have a solution :)

Answer 5

Make both into EQUATIONS!

Answer 6

Red Kite: 8x + 100
Blue Kite: 5x + 180

Answer 7

8x +100 = 5x +180
3x = 80
x=26.666

X is the amount of seconds by the way.

At 26 seconds or less, The blue kite is higher and at 27 seconds or more, the red kite is higher.