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Rzqust [24]
3 years ago
9

How many numbers are equal to the sum of two odd, one digit numbers

Mathematics
1 answer:
Paul [167]3 years ago
5 0
Here is a list of the odd number paired

1+3, 1+5, !+7, and !+9  (there are 4 unique sums - 4, 6,8 and 10)
3+5, 3+7, 3+9  (notice I did not pair 3 with 1 and the the only new sum is 12)
5+7, 5+9  (the only new sum is 14)
7+9  (16 is a new sum)

The sums (no repeats) are 4,6,8,10,12,14 and 16 for a total of seven numbers.
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babymother [125]

Answer:

The common difference would be calculated as:

(a21-a19)/2

(-164--(-58 ))/2 (Replacing the values )

(-164 +58)/2 (Changing signs)

(-106)/2(Subtracting)

-53

Then we are going to replace the common difference(d) in the sequence formal with the 21st term . It is done for finding the first term of the sequence.

a21=a0+d*(n-1)

-164=a0+-53*(21-1) (Replacing the values)

-164=a1-53(20) (Subtracting)

-164=a1-1060 (Multiplying )

-164+1060=a1 (Adding 1060 on both sides of the equation)

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The answer would be : an= 896-53*(n-1), which is the option B.

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Part C The person whose equation has the greater unit rate is the person whose tiles cover the most area per tile. Whose equatio
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UkoKoshka [18]
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First we need to find that third angle.
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The Law of Sines states that

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14 / Sine (77) = side x / Sine (41)

14 * Sine (41) / Sine (77) = side x

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<span>side x = 9.18484 / 0.97437
</span>
<span> <span> <span> side x = 9.4264396482 </span> </span> </span> 









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8 0
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