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Amiraneli [1.4K]
3 years ago
11

(1) What is the distance between the points (–8, –2) and (–7, –2)?

Mathematics
1 answer:
Ad libitum [116K]3 years ago
7 0

Answer:

The distance between points (- 8 , - 2) , ( - 7 , - 2) is 1 unit

Step-by-step explanation:

Given as :

The coordinate are

x_1 , y_1 = - 8 , - 2

x_2 , y_2 = - 7 , - 2

Let <u>The distance between the points = d</u>

So, d = \sqrt{(x_2 - x_1)^{2} + (y_2 - y_1)^{2} }

Or, d = \sqrt{((-7) - (-8))^{2} + ((-2) - (-2))^{2} }

Or, d =  \sqrt{(-7 + 8)^{2} + (- 2 + 2)^{2} }

Or, d = \sqrt{(1)^{2} + (0)^{2} }

Or, d = \sqrt{1 + 0}

∴  d =  \sqrt{1}

i.e d = 1

So, The distance between the points = d = 1 unit

Hence, The distance between points (- 8 , - 2) , ( - 7 , - 2) is 1 unit  Answer

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Determine the value of x in the diagram.<br> 112<br> x<br> &lt;<br> 68<br> 112<br> =
nasty-shy [4]

Answer:

The value of x is 68, all the angles in a parrelelogram equal 360, 68 + 112 + 112 + x = 360, all the angles are 292, and subtracted from 360 you get 68

Step-by-step explanation:

3 0
3 years ago
A necklace regularly sells for $18.00. the store advertises a 15% discount. what is the sale price of the necklace in dollars
SSSSS [86.1K]
I can solve with 2 methods:

I. Because the discount is 15 % of 18 $ , the price will be (100-15=85) 85 % of 18 $
18*85/100= 15,3 $ ( the sale price)

II. The discount is 15 % of 18$
15*18/100= 2,7$  ( the discount)
then I decrease it from the regularly price
18$-2,7$=15,3 $ (the sale price)

Personally I believe the first is an easier method.
I hope you understand and you can apply this in every similary problem.



6 0
3 years ago
Is 7 a factor of 56 or is 8 a factor of 56?
adelina 88 [10]
8 and 7 are both a factor of 56.
8 0
3 years ago
Read 2 more answers
Alex buys 24 apples and when he opens it 6 apples are bad whats the perecentage of the bad apples
nataly862011 [7]
6/24=1/4=25%

answer is 25% are bad
6 0
3 years ago
In a survey conducted by the Gallup​ Organization, 1100 adult Americans were asked how many hours they worked in the previous we
const2013 [10]

Answer:

1) Increase the sample size

2) Decrease the confidence level

Step-by-step explanation:

The 95% confidence interval built for a sample size of 1100 adult Americans on how much they worked in previous week is:

42.7 to 44.5

We have to provide 2 recommendations on how to decrease the margin of Error. Margin of error is calculated as:

M.E=z_{\frac{\alpha}{2} } \times \frac{\sigma}{\sqrt{n}}

Here,

z_{\frac{\alpha}{2} } is the critical z-value which depends on the confidence level. Higher the confidence level, higher will be the value of critical z and vice versa.

\sigma is the population standard deviation, which will be a constant term and n is the sample size. Since n is in the denominator, increasing the value of n will decrease the value of Margin of Error.

Therefore, the 2 recommendations to decrease the Margin of error for the given case are:

  1. Increase the sample size and make it more than 1100
  2. Decrease the confidence level and make it lesser than 95%.
7 0
3 years ago
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