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Aleksandr-060686 [28]
3 years ago
11

Please help!? Work out the size of angle x. 42 degrees and 123 degrees?

Mathematics
2 answers:
vlabodo [156]3 years ago
5 0

Answer:

Sorry I don´t know the answer but I tried

Step-by-step explanation:

netineya [11]3 years ago
4 0

Answer:

x° = 99°

Step-by-step explanation:

Sum of angles on a straight line is 180°.

  • 180° - 123° = 57° (sum of angles on a straight line)

Sum of angles in a triangle is 180°. Let <em>u</em><em> </em>be the value of the unknown angle in the triangle.

  • 57° + 42° + u° = 180°

u° = 180° - 57° - 42°

u° = 81°

Sum of angles on a straight line is 180°.

  • x° + 81° = 180°

x° = 180° - 81°

x° = 99°

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Two different numbers are selected simultaneously and at random from the set {1,2,3,4,5,6,7,8,9,10}. What is the probability tha
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The probability of getting positive difference between the numbers 3 or greater between 1,2,3,4,5,6,7,8,9,10 if two numbers are selected is 28/45.

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We have to find the probability that the positive difference between the numbers selected is 3 or greater.

Probability is the likelihood of happening an event among all the events possible.

Total number of combinations when two numbers are selected from 10 numbers is 10 C 2=10!/2!(10-2)!

=10*9*8!/2*1(8!)

=10*9/2

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Combinations of numbers whose difference will be 3 or more are: (10,7),(10,6),(10,5),(10,4)(10,3)(10,2)(10,1)(9,6)(9,5)(9,4)(9,3)(9,2)(9,1)(8,5)(8,4)(8,3)(8,2)(8,1)(7,4)(7,3)(7,2)(7,1)(6,3)(6,2)(6,1)(5,2)(5,1)(4,1)

Total numbers =28

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=28/45

Hence the probability that two numbers selected gives difference of 3 or more is 28/45.

Learn more about probability at brainly.com/question/24756209

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