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AlexFokin [52]
3 years ago
15

Read this and answer this for me Thanks <3

Mathematics
1 answer:
Norma-Jean [14]3 years ago
6 0

Answer:

The answer is 1st point

Step-by-step explanation:

(12x²+4x-5)-(9x²-9x+1)

= 12x²+4x-5-9x²+9x-1

= 3x²+13x-6

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Consider a bell-shaped symmetric distribution with mean of 16 and standard deviation of 1.5. Approximately what percentage of da
fredd [130]

Answer: 95.45 %

Step-by-step explanation:

Given : The distribution is bell shaped , then the distribution must be normal distribution.

Mean : \mu=\ 16

Standard deviation :\sigma= 1.5

The formula to calculate the z-score :-

z=\dfrac{x-\mu}{\sigma}

For x = 13

z=\dfrac{13-16}{1.5}=-2

For x = 19

z=\dfrac{19-16}{1.5}=2

The p-value = P(-2

0.9772498-0.0227501=0.9544997\approx0.9545

In percent, 0.9545\times100=95.45\%

Hence, the percentage of data lie between 13 and 19 = 95.45 %

6 0
3 years ago
The cost of a pound of nails increased from ​$2.17 to ​$2.52. What is the percent of increase to the nearest​ whole-number perce
Cloud [144]

Answer:

16%  is the percent of increase to the nearest​ whole-number percent.

Step-by-step explanation:

As the cost of a pound of nails increased from ​$2.17 to ​$2.52.

  • $2.52 - $2.17 = $0.35

so dividing the 0.35 by 2.17 would give us the percetange of increase

  • 0.35/2.17 = 0.16 which is 16%.

Therefore, 16%  is the percent of increase to the nearest​ whole-number percent.

7 0
3 years ago
Evaluate the function given the value<br> f(x) = 1 - 2x; f(-12)<br> r
vesna_86 [32]

Answer:

The answer is 25

Step-by-step explanation:

f( - 12) = 1 - 2( - 12) = 1 + 24 = 25

3 0
3 years ago
How do you simplify -3x²ym + 7x - 5ymx² + 16x
brilliants [131]
 you cant add or subtract or multiply or divide if the variables arent the same so the simplified version of <span>-3x²ym + 7x - 5ymx² + 16x would be 
</span> -3x²ym <span>- 5ymx² + 23x</span>
3 0
3 years ago
Read 2 more answers
Adding decimals <br><br> 5.66 + 5.99 =
nevsk [136]

Answer:

the correct answer to this is 11.65

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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