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3 years ago

Please help! 15 pts!

Mathematics

1 answer:

yulyashka [42]3 years ago

7 0

Answer:

6 years

their average age now is 15

so, in six years the average age will be 21

Step-by-step explanation:

If im wrong you have my regrets

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What is the reciprocal of -2/3

ryzh [129]

3/-2

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4 years ago

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Unit cubes and solid figures

s344n2d4d5 [400]

The dimensions are 10 x 10 x 10. I this is because when it was it can hold up to 1000 cubes, that says the volume is 1000. I know that V=lwh so 1000 = lwh. If you do 10 x 10 x 10 you get 100! Hope this helped :D

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3 years ago

In which quadrant does the point with c ordinate (4, -3) lie?

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Answer:

Step-by-step explanation:

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3 years ago

A geometric sequence is defined by the equation an = (3)3 − n.

Delvig [45]

PART A

The geometric sequence is defined by the equation

$a_{n}=3^{3-n}$

To find the first three terms, we put n=1,2,3

When n=1,

$a_{1}=3^{3-1}$

$a_{1}=3^{2}$

$a_{1}=9$
When n=2,

$a_{2}=3^{3-2}$
$a_{2}=3^{1}$

$a_{2}=3$

When n=3

$a_{3}=3^{3-3}$

$a_{3}=3^{0}$
$a_{1}=1$
The first three terms are,

$9,3,1$

PART B

The common ratio can be found using any two consecutive terms.

The common ratio is given by,
$r= \frac{a_{2}}{a_{1}}$
$r = \frac{3}{9}$

$r = \frac{1}{3}$

PART C

To find
$a_{11}$

We substitute n=11 into the equation of the geometric sequence.

$a_{11} = {3}^{3 - 11}$

This implies that,

$a_{11} = {3}^{ - 8}$

$a_{11} = \frac{1}{ {3}^{8} }$

$a_{11}=\frac{1}{6561}$

4 0

3 years ago

Keep y’all help since the tutors toooo busyyyy

astra-53 [7]

The answer to your question is C

7 0

3 years ago