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3 years ago

Help quickly please!

Mathematics

1 answer:

stepladder [879]3 years ago

8 0

Im not too sure, but C might work as an answer...

Sorry if it's wrong :(

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Help please this is urgent

Licemer1 [7]

25a-5a

Hope this helps!!!!

8 0

3 years ago

Read 2 more answers

I got the first two can you help me with the last one PLZ

Nat2105 [25]

1. Geometric Sequence

2. $a_n = a_{n-1} * 3$

3. $a_n = 6 * (3)^{n-1}$

Step-by-step explanation:

Given sequence is:

6, 18, 54, 162,....

Here

$a_1 =6\\a_2 = 18\\a_3 = 54$

(a) Is this an arithmetic or geometric sequence?

We can see that the difference between the terms is not same so it cannot be an arithmetic sequence.

We have to check for common ratio (ratio between consecutive terms of a sequence) denoted by r

$r = \frac{a_2}{a_1} = \frac{18}{6}= 3\\r = \frac{a_3}{a_2} = \frac{54}{18} = 3$

As the common ratio is same, the given sequence is a geometric sequence.

(b) How can you find the next number in the sequence?

Recursive formulas are used to find the next number in sequence using previous term

Recursive formula for a geometric sequence is given by:

$a_n = a_{n-1} * r$

In case of given sequence,

$a_n = a_{n-1} * 3$

So to find the 5th term

$a_5 = a_4*3\\a_5 = 162*3\\a_5 = 486$

(c) Give the rule you would use to find the 20th week.

In order to find the pushups for 20th week, explicit formul for sequence will be used.

The general form of explicit formula is given by:

$a_n = a_1 * r^{n-1}$

Putting the values of a_1 and r

$a_n = 6 * (3)^{n-1}$

Hence,

1. Geometric Sequence

2. $a_n = a_{n-1} * 3$

3. $a_n = 6 * (3)^{n-1}$

Keywords: Geometric sequence, common ratio

Learn more about geometric sequence at:

#LearnwithBrainly

4 0

3 years ago

What is the measure of the lowercase c?

Leona [35]

The measure of angle c would be 84

3 0

3 years ago

Jayla and Hailey were paying a dinner check, but they were not sure how much they should tip for their bill of $25.50. If a 12%

DochEvi [55]

Answer:

tip total $4

tip per person $2

total (bill plus tip) $29.

total each person $15

Step-by-step explanation:

3 0

3 years ago

Terry's brother can paint a room in 3 hours less than Terry can paint it. Working together they can complete the job in 2 hours.

sukhopar [10]

Answer:

Step-by-step explanation:

the equation would be 2/(x-3) + 2/x = 1 derived from the work formula of T/A + T/B = 1; T representing total time working together, A/B respectively representing the two different rates of working. In the end Terry would spend 6 hours working alone.

5 0

3 years ago