Respuesta :
Answer:
2 hours.
Step-by-step explanation:
Money earned for 14 hours of life-guarding = 14*18 = $252. If he worked another 5 hours to make the maximum of 19 he would earn 252 + 5*9
= $297 but he wants to work a minimum of hours for a minimum of 270.
Thus we have the inequality:
252 + 9x ≤ 270
9x ≤ 18
x ≤ 2.
So the number of hours he must do clearing tables = 2.
Answer:
The set of two or more inequalities in one or more variables is referred to as a system of inequalities, and the further discussion can be defined as follows:
System of inequalities:
- Get y alone on one side of a linear inequality with 2 variables (x,y). Consider the equation that results when the inequality sign is changed to an equality sign.
- This equation has a line as its graph. A dashed line is drawn if the inequality is strict.
From the question, we know
[tex]21 x+10y \geq 170[/tex] money
[tex]x+y \leq 12[/tex] hours
so
Inequality [tex]1 : y\geq - \frac{21}{10} x+17\\\\[/tex]
Inequality [tex]2 : y\leq -x+12\\\\[/tex]
and [tex]x=0, y= 0[/tex]
For example
[tex]y = 2 \ \ \ x=10[/tex]
- Please find the attached file.
Find out more about the graph here:
brainly.com/question/2025686
Step-by-step explanation: