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!
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Answer:

Step-by-step explanation:
GIVEN: Emma started biking to the coffee shop traveling
, after some time the bike got a flat so Emma walked the rest of the way, traveling
If the total trip to the coffee shop took
and it was
away.
TO FIND: how long did Emma travel at each speed.
SOLUTION:
Let the distance traveled by Emma through bike is 
Total time taken when traveled by bike 
Distance traveled through feet 
Total time taken when traveled by feet 
Now,
Total time taken 



Distance traveled through feet 
Hence distance traveled using bike is
and by feet is 
Answer: 14a - b - 3c + 21
The answer i would pick is 2