At 8:38 P. M., a parachutist is 3800 feet above the ground. At 8:49 P. M., the
parachutist is 1400 feet above the
ground. Find the average rate of
change in feet per minute.

218.18 feet per minute

Step-by-step explanation:

3800-1400= 2400

2400/ 11= 218.18

ok

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18