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11111nata11111 [884]
3 years ago
13

How would you solve this and what would the answer be? im very confused

Mathematics
1 answer:
djverab [1.8K]3 years ago
8 0

Answer:

141 degrees.

Step-by-step explanation:

This is a seven sided polygon so first we work out the total value of the interior angles from the formula:

Total angles = 180(n - 2)

= 180 * (7-2)

= 180 * 5

= 900 degrees.

Therefore x = 900 - (122+125+148+107+126+131)

= 900 -  759

= 141 degrees.

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Helga [31]

Answer:

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3 years ago
A ferry departs from a port along the Sands River at 10:00 am. The ferry travels at a speed of 15 mph in still water and returns
jek_recluse [69]

Answer:

Speed of river's current = 5 mph

Step-by-step explanation:

Let 'd' be the distance covered  

 Let x be the speed of the rivers current

Speed upstream = 15-x

speed downstream = 15+x

Time = distance / speed

time upstream = \frac{d}{15-x}

time downstream = \frac{d}{15+x}

the ferry trip upstream takes twice as long as its return trip downstream

\frac{d}{15-x}= \frac{2d}{15+x}

divide both sides by d

\frac{1}{15-x}= \frac{2}{15+x}

cross multiply

15+x= 2(15-x)

15+x= 30-2x

Add 2x on both sideds

15+3x= 30

subtract 15 from both sides and divide by 3

3x=15

x=5

Speed of river's current = 5 mph

8 0
3 years ago
Im so confused all i know is that it isn't C
hodyreva [135]
Well I’m not 100 percent sure but I believe it’s b
3 0
3 years ago
Read 2 more answers
2:45pm to 5:30 pm how long did it take?
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Answer:

2 hours and 45 minutes. or 165 minutes

Step-by-step explanation:

4 0
3 years ago
I need help with this whats the answers on #1 i suck at geometry plz
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3 years ago
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