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2 years ago

Pls answer asap 7 - 3 r = r - 4 ( 2 + r)

Mathematics

1 answer:

Marianna [84]2 years ago

8 0

Answer:

no real answer

Step-by-step explanation:

distribute the -4 and combine all of the like terms on the left side = r-8-4r, then -8-3r

then we have 7-3r=-8-3r

from here, we can already tell that there's no real answer. this is because the two -3r will cancel, leaving no variable.

since 7 doesn't equal -8, there is no answer.

if, for example, the value on both sides of the equal sign were the same after the variable was eliminated, then your answer would be all real numbers

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6. Jeffrey is flying a kite but it got caught at the top of a 15 ft tree that is 65 ft

-Dominant- [34]

Answer:

Step-by-step explanation:

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3 years ago

In a reflection, pairs of corresponding points lie on parallel lines. True or False?

Lerok [7]

The statement that: pairs of corresponding points lie on parallel lines in a reflection, is false.

<h3>What are reflections?</h3>

When a point is reflected, then the point is flipped across a point or line of reflection

When a point is reflected, the following highlights are possible

The corresponding points can line on the same line
The corresponding points can line on parallel lines

Using the above highlights, we can conclude that the statement is false.

This is so because, corresponding points are not always on parallel lines

Read more about reflection at:

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6 0

3 years ago

What is the value of 10C3?

Zigmanuir [339]

The answer is B. 120

nCr = n! / ((r! * (n - r)!)

n = 10
r = 3

10C3 = 10! / ((3! * (10 - 3)!)
= 10! / ((3! * 7!)
= (10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1) / (3 * 2 * 1 * 7 * 6 * 5 * 4 * 3 * 2 * 1)
= 3628800 / 30240
= 120

6 0

3 years ago

Find the area and circumference of a circle with diameter 8yd

Lilit [14]

50.27yd²
Using the formulasA=πrto the second powerd=2rSolving forAA=14πd2=14·π·82≈50.26548yd²

4 0

3 years ago

Read 2 more answers

Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below

emmasim [6.3K]

Answer:

Tera had the higher z-score, so she should be offered the job.

Step-by-step explanation:

Z- score:

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:

Whoever has the higher z-score should get the job.

Brittany:

Scored 88.3, mean 63.1, standard deviation 14. So

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

$Z = \frac{88.3 - 63.1}{14}$