ANSWER
(6, 9) and (7, 8)
EXPLANATION
We have that x represents the number of hours she spends babysitting and y represents the number of hours she spends cleaning houses.
She cannot work for more than 15 hours per week. This means that:
[tex]x\text{ + y }\leq\text{ 15 \_\_\_\_\_\_\_\_(1)}[/tex]
She wants to earn at least $90 per month. This means that:
[tex]8(x)\text{ + 5(y) }\ge\text{ 90 \_\_\_\_\_\_\_\_\_\_(2)}[/tex]
We can solve this by plotting the graphs of the inequalities. We have:
The solution of the inequalities is the region that the two shaded regions intersect.
Due to the fact that we are considering number of hours (x and y), we will only concern ourselves with the positive portion of the graph.
So, the pairs (x, y) that can represent the number of hours that Anetha can work are the pairs that fall in the positive x and y axis of the shaded part of the graph.
They are:
(6, 9) and (7, 8)
