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mixas84 [53]
3 years ago
9

Can some one help me asap

Mathematics
1 answer:
zavuch27 [327]3 years ago
4 0
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)
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then divide both sides by 2 

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3 years ago
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Step-by-step explanation:

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Ursula tosses two six-sided number cubes and MULTIPLIES the numbers rolled. Which of these is a list of the outcomes of the two
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A. The solution is (−2,−3)
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9514 1404 393

Answer:

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Step-by-step explanation:

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  x = y -1  ⇒  -2 = -3 -1 . . . . False

Using (x, y) = (-3, -2):

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The solution is (-3, -2).

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If you'd like to solve the set of equations, substitution for x works nicely.

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The solution is (x, y) = (-3, -2).

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