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Natasha_Volkova [10]

3 years ago

7

3 ISINT RIGHT!!!! Please give me an answer!!

1 answer:

dsp733 years ago

8 0

Answer:

6

Step-by-step explanation:

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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

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

8 0

3 years ago

Every person has blood type O, A, B, or AB. A random group of people are blood-typed, and the results are shown in the table.

Evgesh-ka [11]

Answer:

12%

Step-by-step explanation:

$P=\frac{6}{22+20+6+2} =.12$

6 0

3 years ago

What is cos K<br> a) 25/7<br> b) 25/24<br> c) 7/25<br> d) 24/25

AVprozaik [17]

Answer: d)

Step-by-step explanation:

7 is the opposite

25 is the hypotenuse

24 is the adjacent

if u refer back to SOH CAH TOA

cos = adj divided by the hyp

cos K = 24/25

*please make sure to double check for yourself or get another person to look it over just incase*

8 0

3 years ago

Snow White has 30 apples . She gave 6 apples to the prince and 21 apples to her seven dwarfs. Find the percentage of apples Snow

motikmotik

She has 3 apples left

3 0

3 years ago

Read 2 more answers

Evaluate the function f (x) = 4 • 7x for x = -1 and x = 2

coldgirl [10]

F(x) = 4 x 7x

f(x) = 4 x 7(-1)
f(x) = 4 x (-7)
f(x) = -28
(-1, -28)

f(x) = 4 x 7(2)
f(x) = 4 x 14
f(x) = 56
(2, 56)

Hope this helps!!
~Kiwi

5 0

3 years ago

Read 2 more answers