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valentina_108 [34]
3 years ago
10

Please help it’s the Angle relationships

Mathematics
1 answer:
Masja [62]3 years ago
5 0
For number 9, a triangle always adds up to 180 degrees.
Since we know that the triangle is a right triangle, we can state that 3x+11+25+90=180
3x=180-11-25-90
3x=54
x=54/3
x=18
For question 10, vertical angles are equal to eachother so 10=6x+12
10-12=6x
-2=6x
x=-2/6=-1/3
For question 11, 45 and 3x are supplementary angles.
45+3x=180
3x=180-45
3x=135
x=135/3
x=45
Your welcome
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Esmerelda is five times as old as Ruth. Four years ago, the sum of their ages was 22 years. How old is each now?
Lina20 [59]

Answer:

Ruth is  x+4=7/3+4,   esmerelda  is  5x+4=35/3+4

Step-by-step explanation:

if Ruth is x, esmerelda is 5x,

four years ago,

Ruth is x+4,  esmerelda is 5x+4,  depend on the sum, we get:

x+4+5x+4=22, x=7/3

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Ruth is  x+4=7/3+4,   esmerelda  is  5x+4=35/3+4

7 0
4 years ago
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lana66690 [7]

Step-by-step explanation:

1 km = 1000 m

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so. he runs 1000 m at the rate of 3 minutes per km, that means 3 minutes per 1000 m.

now, we can see the solution already with our eyes.

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kykrilka [37]

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