3 years ago

A boy is 20 years old at present. How old was he 3 years ago?

Mathematics

1 answer:

EleoNora [17]3 years ago

3 0

Answer: seven-teen

Step-by-step explanation:twenty minus three

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For the geometric sequence of a1=2 and r=2 find a5

Brrunno [24]

Answer:

$a_5 = 32$

Step-by-step explanation:

The nth term for the geometric sequence is given by:

$a_n = a_1 \cdot r^{n-1}$

where,

$a_1$ is the first term

r is the common ratio

n is the number of terms.

As per the statement:

For the geometric sequence of $a_1=2$ and r=2

We have to find $a_5$

for n = 5;

$a_5=a_1 \cdot r^{n-1}$

Substitute the given values we have;

$a_5 = 2 \cdot 2^4 = 2 \cdot 16$

⇒ $a_5 = 32$

Therefore, the value of $a_5$ is, 32

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4 years ago

What is the least common denominator of the equation 2/9 and 2/3

inna [77]

The least common denominator would be 9, because

a. you can't take 3 out of two in 2/9

b. you can multiply 2/3 by 3 to make 6/9

so the LCD is 9

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3 years ago

TWENTY PTS!!!

Elan Coil [88]

Answer:

d + 7 > (7d + 3)/3

3d + 21 > 7d + 3

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d < 9/2

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Answer:2

Step-by-step explanation:

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Step-by-step explanation:

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A boy is 20 years old at present. How old was he 3 years ago?​

A boy is 20 years old at present. How old was he 3 years ago?