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2 years ago

6

I got an answer but im really not sure if its right so please help

2 answers:

Vladimir79 [104]2 years ago

5 0

Answer:

60 degrees.

Step-by-step explanation:

Since you know that y = 74 because they are vertical angles, and 46 = the angle across from it (there is a theorem for it). Since one line is 180 degrees, and you already know the two sides next to x, which is 74 and 46, you can do 180 - 74 - 46. Your final answer should be 60 degrees.

igor_vitrenko [27]2 years ago

3 0

Answer:

60°

Step-by-step explanation:

so we need to find x

we are given 2 angles 46° and 74° which is in the middle of those numbers.

add 46° + 74° = 120°

since a straight line is 180° subtract 180° by 120° to get 60° = x.

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2 years ago

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a s

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Answer:

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Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73

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We are given that the distribution of exam grades is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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$= 1 -P( z \leq \displaystyle\frac{x - 73}{11})=0.0793$

$=P( z \leq \displaystyle\frac{x - 73}{11})=0.9207$

Calculation the value from standard normal z table, we have,

$P(z \leq 1.410) = 0.9207$

$\displaystyle\frac{x - 73}{11} = 1.410\\x =88.51$

Hence, 88.51 is the minimum score needed to receive a grade of A.

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