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2 years ago

Find the sum of the first 9 terms of the following series, to the nearest integer.

Mathematics

1 answer:

Arturiano [62]2 years ago

4 0

367 is the best answer I came up with

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In this triangle, what is the value of x?

andrezito [222]

I believe the answer is 26.131 degrees. Hope this helps!!!

7 0

3 years ago

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there are 45 boys on the track team. About 25% of the boys were on the team last year. About how many boys were on the track tea

aleksklad [387]

Answer:

about 11 boys were on the track team last year.

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2 years ago

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What is the eighth term in the sequence x+3, - 2x^2 - 6x, 4x^3 +12x^2

Anastasy [175]

Answer:

$a_8=-128x^8-384x^7$

Step-by-step explanation:

The terms of the sequence are:

$x+3,-2x^2-6x,4x^3+12x^2,...$

We can rewrite the terms in factored form to get;

$x+3,-2x(x+3),4x^2(x+3),...$

We can see that the subsequent terms are obtained by multiplying the previous term by $-2x$ . This is called the common ratio.

Therefore the first term of this geometric sequence is $a_1=x+3$ and the common ratio is $r=-2x$ .

The nth term of a geometric sequence is given by: $a_n=a_1(r^{n-1})$ .

Let us substitute the first term, the common ratio, and $n=8$ to obtain:

$a_8=(x+3)(-2x)^{8-1}$

$a_8=(x+3)(-2x)^{7}$

$a_8=-128x^7(x+3)$

$a_8=-128x^8-384x^7$

3 0

2 years ago

Please help, and quickly!

sergey [27]

(3x+1)/14=2x/8
8(3x+1)=2x(14)
24x+8=28x
28x-24x=8
4x=8
x=8/4
x=2

Answer: x=2

7 0

2 years ago

If m <5=42 what is m <4 42 48 128 138

Reika [66]

Answer:

48° or 138°

Step-by-step explanation:

$Complementary \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: Supplementary$

$90° = 42° + m∠4 \: \: \: \: \: 180°= 42° + m∠4$

$48°= m∠4 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 138° = m∠4$

I am joyous to assist you anytime.

5 0

3 years ago