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Serga [27]
3 years ago
12

Please help me on this because I'm not sure if it's a decimal or not

Mathematics
1 answer:
anzhelika [568]3 years ago
3 0
THERE IS NO PICTURE TO ANSWER THIS
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Given the equation: y=(x-1)(x+3). what are the x-intercepts? *
Anna11 [10]

Answer:(

(1,0),(-3,0)

Step-by-step explanation:

4 0
3 years ago
Assume adults have IQ scores that are normally distributed with a mean of 102 and standard deviation of 16. Find the probability
Andre45 [30]

Answer:

57.49% probability that a randomly selected individual has an IQ between 81 and 109

Step-by-step explanation:

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.

In this question, we have that:

\mu = 102, \sigma = 16

Find the probability that a randomly selected individual has an IQ between 81 and 109

This is the pvalue of Z when X = 109 subtracted by the pvalue of Z when X = 81. So

X = 109

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

Z = \frac{109 - 102}{16}

Z = 0.44

Z = 0.44 has a pvalue of 0.67

X = 81

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

Z = \frac{81 - 102}{16}

Z = -1.31

Z = -1.31 has a pvalue of 0.0951

0.67 - 0.0951 = 0.5749

57.49% probability that a randomly selected individual has an IQ between 81 and 109

8 0
3 years ago
A decimal where one or more digit repeats infinity
nikitadnepr [17]

Answer:

Pi is a good answer to this. If you don't know what Pi is, here's what it is: https://www.piday.org/million/

Step-by-step explanation:

3 0
3 years ago
Solve the following system of equations using substitution and show all work.
luda_lava [24]

2x + y = 20

y = 20 - 2x

Substitute into second equation:

6x - 5(20-2x) = 12

6x -100 +10x = 12

16x = 112

x = 7

Plug back into first equation:

2(7) + y = 20

14 +y = 20

y = 6

Answer is x = 7 and y = 6

8 0
3 years ago
Read 2 more answers
What is the solution for this inequality?<br><br> -10x &lt; 40
AlexFokin [52]
Let's solve your inequality step-by-step.<span><span>−<span>10x</span></span><40</span>Step 1: Divide both sides by -10.<span><span><span>−<span>10x</span></span><span>−10</span></span><<span>40<span>−10</span></span></span><span>x><span>−4</span></span>Answer:<span>x><span>−<span>4</span></span></span>
8 0
3 years ago
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