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Viefleur [7K]
3 years ago
14

What is 3n² = 243 I NEED THIS ANSWER QUICKLY!!!!

Mathematics
1 answer:
viva [34]3 years ago
8 0

Answer:

n=9

Step-by-step explanation:

You use reverse PEMDAS.

First you would divide by 3 on both sides. This should give you:

n²=81

Then you would find \sqrt{81}. Which is 9.

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I need the answer for the question -4(x-10)+8 for my homework please.
mixer [17]

Answer:

i think the answer is

-4x+48

7 0
3 years ago
What was two. thirds and fifth twelve
Harrizon [31]
The answer is 1 and 1/12 because you have to have a common denomonator.
4 0
3 years ago
Sociology graduates, upon entering the workforce are normally distributed and earn a mean salary of $30,000 with a standard devi
GrogVix [38]

Answer:

0.62% probability that randomly chosen salary exceeds $40,000

Step-by-step explanation:

Problems of normally distributed distributions 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 question:

\mu = 30000, \sigma = 4000

What is the probability that randomly chosen salary exceeds $40,000

This is 1 subtracted by the pvalue of Z when X = 40000. So

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

Z = \frac{40000 - 30000}{4000}

Z = 2.5

Z = 2.5 has a pvalue of 0.9938

1 - 0.9938 = 0.0062

0.62% probability that randomly chosen salary exceeds $40,000

7 0
3 years ago
HELP!!!
Luda [366]

Trigonometry as taught is mostly about memorizing two lousy triangles, namely half a square and half an equilateral triangle. This one is half an equilateral triangle.

The respective opposite sides of the 30/60/90 triangle are in ratio 1:\sqrt{3}:2

A sine of √3/2 is an opposite of √3 and a hypotenuse of 2, so opposite and hypotenuse of the 60 degree angle. (It's the mama bear, in the middle, just right.)

\sin 60^\circ = \dfrac{\sqrt{3}}{2}

In the end you just have memorize the two tired triangles of trig.

7 0
3 years ago
Can someone answer this​
Veronika [31]

Answer:

b.d-6 that's the correct answer

4 0
3 years ago
Read 2 more answers
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