Answer: C
Step-by-step explanation: bcuz
Answer:
3(7x-3)
Step-by-step explanation: I factor it.
Answer:
c
Step-by-step explanation:
X=5 y=15 (5,15).
This is how you do it:
-4(2x+3y=55): -8x-12y=-220
3(9x+4y=105):27x+12y=315
You add the two new equations together, canceling out the y values, and get the x value. Then, you go back and plug in the x value in the original equation to get the y value.
We can divide 143.50 by 7. This gives us 20.5. This means that she works 20.5 hours a week or 21 hours if you round up.