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skad [1K]
3 years ago
11

I need help asap please

Mathematics
1 answer:
NARA [144]3 years ago
5 0

Midpoint Formula: (\frac{x_{1} + x_{2}  }{2} , \frac{y_{1} + y_{2}  }{2})

Consider R (3, 4) as the first point and S (-5, 5) as the second point, then:

M = (\frac{3 + (-5)  }{2} , \frac{4 + 5  }{2})

   =  (\frac{-2)  }{2} , \frac{9  }{2})

   = (-1, 4.5)

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b. all real numbers

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4 0
3 years ago
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zavuch27 [327]
It'd be easier to do #18 if y ou were to break it up:

                                                        14* (first term + 14th term)
Sum from n=1 to 14 of n =  S      = ---------------------------------
                                               14                       2
                                    
     14(1+14)
= ---------------- = 7(15) = 105 
           2

The sum of twice that is 210.  The sum of "1 from n=1 to n=14" is just 14.

The final sum is 210 + 14 = 224 (answer)
4 0
3 years ago
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