Ahot air balloon is at an altitude of 240 feet. the balloon descends 30 feet per minute. what equation gives the altitude y, in feet, of the hot-air balloon after x minutes?
6th grade go math
plz explain how you found the answer!
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Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.

Which of the following will form the composite function?

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?