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Norma-Jean [14]

3 years ago

9

Please help me .................

1 answer:

Zinaida [17]3 years ago

6 0

Answer:

<em><u>Hi</u></em><em><u> </u></em><em><u>you</u></em>

Hope that will help you

<em>Nice</em><em> </em><em>time</em>

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in a AP the first term is 8,nth term is 33 and sum to first n terms is 123.Find n and common difference

allsm [11]

I believe there is no such AP...

Recursively, this sequence is supposed to be given by

$\begin{cases}a_1=8\\a_k=a_{k-1}+d&\text{for }k>1\end{cases}$

so that

$a_k=a_{k-1}+d=a_{k-2}+2d=\cdots=a_1+(k-1)d$

$a_n=a_1+(n-1)d$

$33=8+(n-1)d$

$21=(n-1)d$

$n$ has to be an integer, which means there are 4 possible cases.

Case 1: $n-1=1$ and $d=21$ . But

$\displaystyle\sum_{k=1}^2(8+21(k-1))=37\neq123$

Case 2: $n-1=21$ and $d=1$ . But

$\displaystyle\sum_{k=1}^{22}(8+1(k-1))=407\neq123$

Case 3: $n-1=3$ and $d=7$ . But

$\displaystyle\sum_{k=1}^4(8+7(k-1))=74\neq123$

Case 4: $n-1=7$ and $d=3$ . But

$\displaystyle\sum_{k=1}^8(8+3(k-1))=148\neq123$

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3 years ago

Nikolay [14]

The answer is C because 100 doesn’t change but 12 is dependent on the number of people.

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What is the slope of the equation 3x - 4y = 32?<br> -3/4<br> -8<br> 3/4<br> 8

Thepotemich [5.8K]

Answer:

y=34x−8

Step-by-step explanation:

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Charlene is knitting a baby blanket. She wants its width, w, to be at least half its length, l. She estimates that she has enoug

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I believe the answer is C - 60 inches. 60 x 2 = 120, which is both lengths, and since he width is half the length, then 30 x 2 = 60. So 130 (length) + 60 (width) = 180. So 60 inches would be the maximum length for both sides.

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2 years ago

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X - y = 2 and x + y = -6 find intersecting point and graph

yulyashka [42]

Intersecting point 4,2 with slope of 1/2

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