can somebody help me with 6 and 7 and show the work for it? thank you

Answer:
Answer For Number 6 is $30
Step-by-step explanation:
We can find how much molly would save by first finding out how much 20% of $275 is. We can do that by multiplying 275 by 0.20 since 0.20 is 20% in decimal form
[tex]275*0.20 = 55[/tex]
Now that we know 20% of 275, we can find the price of the microwave at store B by subtracting 55 from the original price.
[tex]275 - 55=220[/tex]
Now we can find how much Molly would save by subtracting our discounted price from the price of the microwave from store A
[tex]250-220=30[/tex]
Hence, the amount she would save is $30