Answer:

Step-by-step explanation:
Cost of 4 TVs = $ 680
<u>Finding</u><u> </u><u>the</u><u> </u><u>cost</u><u> </u><u>of</u><u> </u><u>1</u><u> </u><u>TV</u>

<u>Finding</u><u> </u><u>the </u><u>cost</u><u> </u><u>of</u><u> </u><u>7</u><u> </u><u>TVs</u>
Since, the cost of 7 TVs is more than that of 1 TV. So, the cost of 1 TV is multiplied by 7

Hope I helped!
Best regards! :D
Answer
3.7 or approximately 4 gallons
Step-by-step explanation:
7x2=14 total liters.
3.78 liters=1 gallon
14/3.78= 3.7 gallons
Using: A^2+b^2=c^2
A&b= (√10)^2=10
10+10=c^2
20=c^2
(take the square root of 20)
c=2√5
Your answer is D