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irina1246 [14]
3 years ago
12

Help me solve (b) in this quadrilateral

Mathematics
2 answers:
Natasha_Volkova [10]3 years ago
5 0

Answer:

Hello!

The answer is 87 degrees!

I hope I was of help!  If not please let me know!  Thank you!

Step-by-step explanation:

Savatey [412]3 years ago
3 0

Answer:

b = 87°

Step-by-step explanation:

In order to answer this question, we need to utilise an important angle fact which is <em>angles in a quadrilateral add up to 360° </em>

Using the information we can set up an equation to find the value of b

→ Form equation

63 + 140 + 70 + b = 360

→ Simplify

273 + b = 360

→ Minus 273 from both sides isolate b

b = 87°

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Please include step by step instruction, so I can learn how to solve the problem. Thank you
Yuki888 [10]

9514 1404 393

Answer:

  A, C

Step-by-step explanation:

First of all, recognize that any basic arithmetic operation between a rational number and an irrational number will have an irrational result. That means, you can eliminate any answer choices that involve an irrational number.

Fractions and mixed numbers involving integers are <em>always rational</em>, so you only need to look at the radicals. You know 9 is 3×3, so is a perfect square, and √9 = 3 is rational. You know 5 is not a perfect square, so <em>√5 is irrational</em>.

Considering the above, any expression involving √5 will have an irrational result. That means you can eliminate choices B and D.

  choices A and C will result in a rational number

_____

<em>Additional comment</em>

  A = 6.8 +0.75 = 7.55 (rational)

  C = 6.8 × 0.75 = 5.100 (rational)

7 0
3 years ago
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Answer:  x=1

They all have 1 for their x coordinate; 'nuff said.

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Find the center and radius of this circle: (x+2)^2 + (y-3)^2 =100
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Step-by-step explanation:Happy to help :)

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