An airplane flies at a rate of 356 km/h. The plane travels a total distance of 1424 km. (Use Distance = Rate * Time for your equ
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Working be x and classes be y
- x≤40
- x≥30
So
- 30≤x≤40
And
- 2≤y≤6
Graph both .
The solution region is the best way.(Blue part)
Lets multiply equation (2) by -2 to get:
Now we can add equations (1) and (2) to eliminate x:
Now that we know the value of y, we can replace it in equation (1) to get the value of x:
We can conclude that both x and y are equal to 3.