Which of the following points are solutions to the system of inequalities 2x – 3y > 9 and -x – 4y > 8?
a. (1,-3)
b. (-1,-3)
c. (1,3)
d. (-1,3)
Thanks! 🙂
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Check a. x=1, y=-3 . The first inequality gives 2- -9>9, 11>9 which is true
The second inequality gives -1 –12>8, 11>8 and this is true so a. is OK
Now you do the others.
a million) resolve for y interior the 1st equation, substitute that for y interior the 2d equation and calculate x, circulate back to the 1st equation and replace x with the value you calculated and calculate y. 2) Graph the 1st inequality in a dashed line and shade the section above it then graph the 2d inequality with a sturdy line and shade the section under it. Your ordered pair will fall interior the section shaded by potential of the two inequalities. 3) amplify the left-hand edge of the equation and notice. 4) the generic variety of a linear equation is y = ax + b the place a is the slope and b is the intercept. 5) Do your individual homework.