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2 years ago

Solve for? ^^ How would I be able to find the other number that is missing?

Mathematics

2 answers:

Ede4ka [16]2 years ago

6 0

Answer:

66° by adding up 75° and 39°, we get 114°.

since all triangles equal 180°, 180° minus 114° is 66°

zubka84 [21]2 years ago

5 0

Answer:

66°

Step-by-step explanation:

For this type of question, first you should know that all the three angles of a triangle sum up to 180°. Let's say the three angles are ∠a, ∠b and ∠c, so if we add the values of all these three angles they would always be equal to 180°.

In this question, we are given the measure of two angles and are asked to find the third angle:

75° + 39° + ? = 180°

? = 180° - 75° + 39°

? = 66° Answer

Hope that helps...

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Ivanshal [37]

Solution:

8.2 × 74 = 606.8

4 0

4 years ago

The original price of a theater ticket

spayn [35]

Answer:

40% discount

Step-by-step explanation:

Take the original price and subtract the new price

20-12

The discount is 8

Divide the discount by the original price

8/20 =.4

Multiply by 100 to get the percent

.4 * 100 = 40%

There is a 40 percent discount

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3 years ago

Read 2 more answers

Suppose a subdivision on the southwest side of Denver, Colorado, contains 1,500 houses. The subdivision was built in 1983. A sam

mihalych1998 [28]

Answer:

0.0268 = 2.68% probability that the sample average is greater than $229,500

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Single house:

The mean appraised value of a house in this subdivision for all houses is $228,000, with a standard deviation of $8,500, which means that $\mu = 228, \sigma = 8.5$

Sample:

Sample of 120, so, by the central limit theorem, $n = 120, s = \frac{8.5}{\sqrt{120}} = 0.7759$

What is the probability that the sample average is greater than $229,500?

This is 1 subtracted by the pvalue of Z when X = 229.5. So

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

By the Central Limit Theorem

$Z = \frac{X - \mu}{s}$

$Z = \frac{229.5 - 228}{0.7759}$

$Z = 1.93$

$Z = 1.93$ has a pvalue of 0.9732

1 - 0.9732 = 0.0268

0.0268 = 2.68% probability that the sample average is greater than $229,500

7 0

3 years ago

The bottom floor of a parking garage has an elevation of -36 feet. The top floor is 124 feet higher. What is the elevation of th

Reika [66]

Answer:

x-36=214

Step-by-step explanation:

If you already have the elevation of the bottom floor, you need to figure out how to get the top floor's elevation by taking 124 and 36 and adding them together. You will get 160. Then, take 160 and plug it in for x, leaving you with x-36=124 or 160-36=124. Hope this helps.

8 0

3 years ago

If every 4 cm on a scale drawing is equal to 3 yards in real life, which of the scaled-drawing lengths below would be less than

WARRIOR [948]

Answer:

B and C

Step-by-step explanation:

Firstly do 16/4 which gives you 4 and then times that by 4 to give you 12 yards. Rinse and repeat this to find out how many yards are in each situation.

3 0

3 years ago