1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
julsineya [31]
3 years ago
14

An auditorium has 30 rows with 10 seats in the first row, 12 in the second row, 14 in the third row, and so forth. How many seat

s are in the auditorium? (1 point)
Mathematics
2 answers:
WARRIOR [948]3 years ago
8 0

Answer:

My answer is 1170 but the way I figured out the problem was by listing numbers 1-30. the problem state that the 1st row had 10, 2nd row had 12, and 3rd row had 14 and so forth. So I basically did the same method till I got to 30 and then add up all the numbers which gave me the answer of 1170.

Step-by-step explanation:

Grace [21]3 years ago
5 0

Answer:

1170

Step-by-step explanation:

<em>hey there,</em>

(the other person just calculated each number themselves then added them up which i guess is okay but not in the long term for when you're taking a test for example or your teacher asks you this kind of question so it's better to memorize a formula.)

< There are two types of sequences: arithmetic and geometric. So also two formulas for finding sums of each. This situation is an arithmetic sequence.

Formula for the sum of an arithmetic sequence: S_n=\frac{n}{2} (a_1+a_n)

We know there are 30 total rows so <em>n</em> = 30. <em>a1 </em>is the very first term of a sequence so this is 10 in this situation. Before we fill in the formula, we should find what <em>an</em> is equal to.

For this, we will use the basic formula you learned previously: a_n=dn+c

<em>d</em> (the common difference) = a2-a1 = 12-10=2

<em>c </em>(the common ratio) = a1-d = 10-2 = 8

an = dn + c = 2(30) + 8 = 68

Now that we have found what a_n is equal to, we can plug everything into the sum equation.

S_n = \frac{30}{2} (10+68)=1170

So 1170 is your final answer. >

<u>Hope this helped! Feel free to ask anything else.</u>

You might be interested in
What is 1 2/3 minus -5 2/3 as a fraction
Sati [7]
7 1/3 hope this helps!
7 0
3 years ago
On the day before an election in a large city, each person in a random sample of 1,000 likely voters is asked which candidate he
gayaneshka [121]

Answer:

It's not possible to reach a conclusion about who will vote candidate Taylor because this is a random sample and not a population census or experiment.

Step-by-step explanation:

It is impossible to reach a conclusion about the proportion of all likely voters who plan to vote for candidate Taylor because the 1,000 likely voters in the sample represent only a small fraction of all likely voters in a large city.

6 0
3 years ago
Read 2 more answers
Annie made fruit punch for 12 people the punch contains sparkling water and 2/3 pint of fruit juice per person if there are 10 2
Furkat [3]
11 pints I believe. Good luck
7 0
3 years ago
Are any of these functions?
Kaylis [27]

Answer:

No, they are not.

Step-by-step explanation:

The easiest way to find a function on a graph is by finding if any points share the same x value. All of these do, so none are functions.

3 0
3 years ago
A gumball machine has 23 green gumballs, 52 red gumballs, 30 pink gumballs, 34 blue gumballs, and 61 yellow gumballs. What perce
Anit [1.1K]
26% red gumballs in the gumball machine because add them all together then divide 52 by 200.
7 0
3 years ago
Other questions:
  • Suki has a 9 foot by 12 foot foot oriental rug. She is making a scale drawing of the rug that is 1 foot long. How many inches wi
    7·1 answer
  • What is the value of [-12]
    13·2 answers
  • SOMEONE PLEASE HELP!!!
    7·1 answer
  • Evaluate the expression using x = –1 and y=3. (6x4y3) What is the value of the expression? –162 –54 162 216
    7·2 answers
  • BRAINLIESTTT ASAP! PLEASE HELP ME :)
    15·1 answer
  • 26 cm/second = x meters/min
    12·1 answer
  • What is the area of rectangle ABCD in square units
    7·2 answers
  • Pls help me anyone <br> I don’t get this pls
    8·1 answer
  • Deandra is doing her math homework. Out of 24 problems total, she completed the first 12 problems in 1 hour and the last 12 in 3
    12·1 answer
  • what is an equation of the line that passes through the point (5,1) and is parallel to the line x+y=9
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!