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nlexa [21]
3 years ago
7

Mhanifa please help fast

Mathematics
1 answer:
Shkiper50 [21]3 years ago
8 0

Answer:

<h3>Q 17</h3>

a is supplementary with 36 and b is supplementary with 113.

  • a = 180 - 36 = 144
  • b = 180 - 113 = 67

Correct choice is D

<h3>Q 2</h3>
  • LM = 1/2(AB + DC) = 1/2(46 + 125) = 85.5
<h3>Q 3</h3>

Diagonals of a rectangle are congruent

  • KM = LN
  • 6x + 16 = 49
  • 6x = 33
  • x = 33/6
  • x = 5.5

Correct choice is A

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Svetradugi [14.3K]

Answer:

3.3h-3.1d-17

Step-by-step explanation:

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3 years ago
Find the zeros of the polynomial function.
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◆ QUADRATIC EQUATIONS ◆

given \: equation \: is \: , \\  \\  {x}^{2}  - 12x + 20 = 0 \\  \\  using \: quadratic \: formula \: , \\  \\ x =  \frac{ - b +  \sqrt{ {b}^{2} - 4ac } }{2a}  \:  \:  \:  \:  =   \frac{ - ( - 12) +  \sqrt{ { (- 12)}^{2} - 4(1)(20) } }{2(1)} \\  \\ x =  \frac{ - b +  \sqrt{ {b}^{2} - 4ac } }{2a}  \:  \:  \:  \:  =   \frac{ - ( - 12)  -   \sqrt{ { (- 12)}^{2} - 4(1)(20) } }{2(1)} \\  \\ x =  \frac{12 + 8}{2}  \:  \:  \:  \:  \: or \:  \:  \:  \: x =  \frac{12 - 8}{2}  \\  \\ x = 10 \:  \:  \:  \:  \: or \:  \:  \:  \:  \: x = 2 \:  \:  \: ans.
8 0
3 years ago
ASAP Please help. Thank You!!! :)
liraira [26]
#25.
Convert the fractional numbers into decimals for easier comparison.
3 2/3 is approximately 3.66
-4 2/5 is approximately -4.4
We now have: 3, 3.66, -4.2, -4.4
In order: -4 2/5, -4.2, 3, 3 2/3

#26.
All positive numbers are greater than negative numbers.
When comparing two negative numbers, the one with the larger absolute value, will be less.
So (G) is correct

#27. 
25 = m + 6.3
25 - 6.3 = m + 6.3 - 6.3
m = 18.7

#28.
h = 3.2-1.6 = 1.6

#29.
x = 15.6 - 9.8 = 5.8

#30
p = 17 - 4.5 = 12.5





6 0
3 years ago
Suppose a research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes during a week. A samp
shutvik [7]

Answer:

0.9910 = 99.10% probability that a sample of 170 steady smokers spend between $19 and $21

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean of 20, standard deviation of 5:

This means that \mu = 20, \sigma = 5

Sample of 170:

This means that n = 170, s = \frac{5}{\sqrt{170}}

What is the probability that a sample of 170 steady smokers spend between $19 and $21?

This is the p-value of Z when X = 21 subtracted by the p-value of Z when X = 19.

X = 21

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

By the Central Limit Theorem

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

Z = \frac{21 - 20}{\frac{5}{\sqrt{170}}}

Z = 2.61

Z = 2.61 has a p-value of 0.9955

X = 19

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

Z = \frac{19 - 20}{\frac{5}{\sqrt{170}}}

Z = -2.61

Z = -2.61 has a p-value of 0.0045

0.9955 - 0.0045 = 0.9910

0.9910 = 99.10% probability that a sample of 170 steady smokers spend between $19 and $21

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Murljashka [212]

Answer:

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Step-by-step explanation:

All you need to do is look at the numbers given in the word problem and convert them to algebraic terms.

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