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2 years ago

2. A guy wire is attached to the top of a radio tower to help support it. The tower

Mathematics

1 answer:

Maru [420]2 years ago

7 0

72 feet’s and 50 feet’s equal 132 feet’s

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Find X and Y and show please show calculations

torisob [31]

Answer:

Y = 90

X = 52

Step-by-step explanation:

Y is on a straight line. The sum of the angles on a straight line is 180.

The only other angle (that is marked) on this straight line, is a 90 degree one. So, <y + 90 = 180.

<y = 90.

Now <x + 38 = 90

so, x = 52

6 0

3 years ago

Adelaide paid $35 for a manicure and gave the manicurist a 20% tip.

Inessa05 [86]

She paid $42 dollars in total.

3 0

2 years ago

A scientist planted seeds in 4 sections of soil for experiment. Not alll of the seeds grew into the plant .after 20 days, the sc

Karolina [17]

What is the question? no question has been asked. need more info to solve.

3 0

3 years ago

Scores on a college entrance exam are normally distributed with a mean of 550 and a standard deviation of 100. Find the value th

Alinara [238K]

Answer:

The value that represents the 90th percentile of scores is 678.

Step-by-step explanation:

Problems of normally distributed samples are solved using 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.

In this problem, we have that:

$\mu = 550, \sigma = 100$

Find the value that represents the 90th percentile of scores.

This is the value of X when Z has a pvalue of 0.9. So X when Z = 1.28.

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

$1.28 = \frac{X - 550}{100}$

$X - 550 = 100*1.28$

$X = 678$

The value that represents the 90th percentile of scores is 678.

4 0

2 years ago

Find the factor of the number 1.30

Kazeer [188]

Answer:

1,2,3,5,6,10,15,30

Step-by-step explanation:

Factors of 30 are the following:-

1x30=30

2x15=30

3x10=30

5x6=30

6x5=30

10x3=30

15x2=30

30x1=30

8 0

2 years ago