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3 years ago

5

11. A large pine tree was struck by lightning and fell as

1 answer:

umka21 [38]3 years ago

5 0

It forms a right triangle.

To find X you can use the Pythagorean theorem which would be written as x^2 = a^2 + b^2

This can be rewritten as x = sqrt(a^2 + b^2)

Using the dimensions of the tree the answer would be :

B. x = sqrt(8^2 + 13^2)

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Write the first five terms of the sequence defined by the recursive formula

stepan [7]

<u>Answer:</u>

The correct answer option is: $S_9=\frac{9}{2} (2+26)$

<u>Step-by-step explanation:</u>

We know that,

the sum of the first $n$ terms of an Arithmetic Sequence is given by:

$S_9=\frac{n(a_1+a_n)}{2}$

where $n$ is the number of terms,

$a_1$ is the first term of the sequence; and

$a_n$ is the first term of the sequence.

So for $a_n=3n-1$ ,

$a_1=3(1)-1=2$

and

$a_9=3(9)-1=26$

Putting these values in the formula to get:

$S_9=\frac{9(a_1+a_9)}{2}$

$S_9=\frac{9(2+26)}{2} \\\\S_9=\frac{9}{2} (2+26)$

<u>First five terms:</u>

$a_1=3(1)-1=2$

$S_1=\frac{1(2+2)}{2}$ =2

$a_2=3(2)-1=5$

$S_2=\frac{2(2+5)}{2}$ =7

$a_3=3(3)-1=8$

$S_2=\frac{3(2+8)}{2}$ =15

$a_4=3(4)-1=11$

$S_4=\frac{4(2+11)}{2}$ =26

$a_5=3(5)-1=14$

$S_5=\frac{5(2+14)}{2}$ =40

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2 years ago

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Describe how to find the GCF of two numbers

lions [1.4K]

You just need to know that a factor is one of the two numbers you multiply together to get a product. Prime numbers have only two factors: 1 and the number itself.

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3 years ago

The price of a cap is increased by 25%.By how much percent should its price be

Arada [10]

Answer: 20%

Step-by-step explanation:

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3 years ago

WILL MARK BRAINLIEST!!! I NEED AN ANSWER SOON!! THX : )

Vlada [557]

Answer:

Incorrect

Does not make sense

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If the ratio of red roses is 4 to 6 and there are a total of 50 roses, how many of them are yellow?

raketka [301]

17 because 4 x 1.5 = 6, 50 / 1.5 = 33.33

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3 years ago