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4 years ago

Numbers 3 & 4 . I really need help

Mathematics

1 answer:

Nana76 [90]4 years ago

8 0

Let's start with #3.

To find the variable y, we know that it is supplementary to an angle that is 38 degrees, meaning that it measures (180-38) degrees, which is equal to 142 degrees.

To find the variable x, we know that in relation to the angle labeled 38 degrees, angle x is a vertical angle, and all vertical angles are congruent, or have the same measure. Thus, the variable x equals 38 degrees.

So the answer to #3 is d. x = 38, y = 142.

Now, let's move on to #4

The diagram shows a right angle which measures 90 degrees (designated by the square symbol), an angle that measures x degrees, and an angle that measures 56 degrees. We can assume from the diagram that the sum of all of these angles equals a straight angle, or 180 degrees.

Thus, 180 = 90 + 56 + x. When this equation is solved, x = 34.

Therefore, the answer to #4 is a. x = 34

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4 years ago

20 This spinner will be spun twice. What is the probability of

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Answer: the probability is 0.25

Step-by-step explanation:

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0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Of those, the odd ones are:

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So we have 5 odd numbers.

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p = 5/10 = 0.5

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The probability of spining an odd number both times, then is the joint probability for two times this same event:

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or 25% in percent form

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3 years ago