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3 years ago

Please help! :Find the measure of angle y

Mathematics

1 answer:

frozen [14]3 years ago

8 0

Answer:

Step-by-step explanation:

showing that the two lines are proportinal based on their markings, it shows that x=55, and then you just do 180-(55+50), which is 75

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Explain how the number of pieces in a whole realates tonthe size of each piece

lilavasa [31]

Well each piece of the whole is what made the whole... so in that case each piece is little 1/4's of the whole....

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4 years ago

Ms.rose bought a package of star stickers out of every 10 stars 4 are gold if there are 60 stars in the pack what fraction of th

hichkok12 [17]

If every 4/10 are gold than 24/60 are gold which is 40%

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3 years ago

X plus y = 0<br> x - y plus 2 = 0

OLga [1]

Negative one plus one equals zero and negative one plus negative one equals negative two plus positive two equals zero

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4 years ago

There are 5 questions on a multiple choice exam, each with five possible answers. If a student guesses on all five questions, wh

Mrac [35]

Answer:

$20.5\%$

Step-by-step explanation:

Let's write out a case for two specific questions being correct and the rest being incorrect:

$\frac{1}{5}\cdot \frac{1}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}$ ,

The $\frac{1}{5}$ represents the chances of getting the question correct, as there are 5 answers and 1 correct answer choice.

The $\frac{4}{5}$ represents the chances of getting the question incorrect, as there are 5 answers and 4 incorrect answer choices.

The equation above does show the student getting two answers correct and three answers incorrect, but it only shows one possible case of doing so.

We can choose any two of the five questions to be the ones the student gets correct. Therefore, we need to multiply this equation by the number ways we can choose 2 from 5 (order doesn't matter): $\binom{5}{2}=10$ .

Therefore, the probability the student gets two questions correct is:

$\frac{1}{5}\cdot \frac{1}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot \binom{5}{2}=\frac{1}{5}\cdot \frac{1}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot \frac{4}{5}\cdot 10=0.2048\approx \boxed{20.5\%}$

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3 years ago

Evaluate the expression when m = -2

yarga [219]

Answer:

-22

Step-by-step explanation:

(Is that Aleks?)

Plug it in.

(-2)^2 + 9(-2) - 8

= 4 + (-18) - 8

= -14 - 8

= -22

8 0

3 years ago