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garri49 [273]
3 years ago
13

Find the measure of ΔABC. Show your work.

Mathematics
1 answer:
valina [46]3 years ago
7 0

Answer:

Step-by-step explanation:    

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Brainliest to correct answer
aksik [14]

Answer:

No, zack will finish first.

Step-by-step explanation:

I would rather not write it out but zack should finish first

4 0
2 years ago
Read 2 more answers
What’s the solution of x+y=29 and y=4x-11
tia_tia [17]

Answer:

x = 8

y = 21

Step-by-step explanation:

y = 4x − 11

x + y = 29

Solve for x:

x + y = 29

x + 4x − 11 = 29

5x − 11 = 29

5x = 40

x = 8

Solve for y:

y = 4x − 11

y = 4 × 8 − 11

y = 21

6 0
2 years ago
What are two numbers that can be multiplied together to equal -30 but also the same two numbers add up to -5
Orlov [11]
I’d say -1 but you probably need a better answer so I’d say -2.5
7 0
3 years ago
If Eudora needs a total of 12 pieces of the shorter ribbon , how many more pieces of the shorter ribbon does she need
Vlada [557]
Where's the rest of the question?
8 0
3 years ago
About 12.5% of restaurant bills are incorrect. If 200 bills are selected at ran- dom, find the probability that at least 22 will
Pavel [41]

Answer:

0.7734 = 77.34% probability that at least 22 will contain an error. Probability above 50%, which means that this is likely to occur.

Step-by-step explanation:

Binomial probability distribution

Probability of exactly x successes on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

Problems of normally distributed distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

About 12.5% of restaurant bills are incorrect.

This means that p = 0.125

200 bills are selected at random

This means that n = 200

Mean and standard deviation:

\mu = E(X) = np = 200*0.125 = 25

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{200*0.125*0.875} = 4.677

Find the probability that at least 22 will contain an error.

Using continuity correction, this is P(X \geq 22 - 0.5) = P(X \geq 21.5), which is 1 subtracted by the p-value of Z when X = 21.5. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{21.5 - 25}{4.677}

Z = -0.75

Z = -0.75 has a p-value of 0.2266.

1 - 0.2266 = 0.7734

0.7734 = 77.34% probability that at least 22 will contain an error. Probability above 50%, which means that this is likely to occur.

8 0
2 years ago
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