Answer:
she would save $47 if she waited.
Step-by-step explanation:
Answer:
Question 3: 
Question 4: 
Question 5: 
Step-by-step explanation:
Question 3:

Question 4:
sign flips when r switches sides
Question 5:

Answer:
No Solutions
Step-by-step explanation:
Multiply the first equation by 5,and multiply the second equation by 2 to get a least common multiple for the x's.
5(4x+6y=3)
2(−10x−15y=−4)
It becomes:
20x+30y=15
−20x−30y=−8
Add these equations to eliminate y:
0=7
Answer:
No solutions.