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olchik [2.2K]
3 years ago
10

Find the distance between the points: (-1, 5) and (3, -3). In your final answer, include the formula and calculations that you u

sed to find the distance.
Mathematics
1 answer:
Genrish500 [490]3 years ago
3 0

Answer:

4\sqrt{5} units

Step-by-step explanation:

The distance between any two points on the x y plane (a,b) and (c,d) has one of two formulas.  \sqrt{(a-c)^2+(b-d)^2} or \sqrt{(c-a)^2+(d-b)^2}  if you use c-a you have to also use d-b, and the other way around for a-c and b-d.  You can rearrange which order you add though.    So with (-1,5) and (3,3) here is the math

\sqrt{(3-(-1))^2+((-3)-5)^2} \\\sqrt{4^2+(-8)^2} \\\sqrt{16+64}\\\sqrt{80}

You could simplify this to 4\sqrt{5}

Let me know if there was anything you didn't understand.

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In 1985 there were 275 cell phone subscribers in the small town of China grove. Subscribers increased by 40% each year after 198
emmasim [6.3K]
1985year ->275cell phones->100%
1994year -> x cell phones ->100%+360%
40% • (1994-1985)= 40% • 9= 360%

275 cell phone 100%
X cell phones. 100+360%=460%
x=275•460%/100%
x=12420/100
x=1265
99% sure this is a correct answer


x=275 • 460%/100%
x=12,420/100
x=1265

1994-1985= 9 yrs • 40%= 360%

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