A private airplane flies at a speed of 220 km/h in still air. On a trip from Red Deer to Fort McMurray, the airplane flies into a headwind. Then it
retums to Red Deer with a tailwind. The rocal distance for the trip is 550 km.
and the total time is 5 h 3 min. Determine the speed of the wind.

1 is c

2 is a

3 is a

step-by-step explanation:

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.