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
nevsk [136]
3 years ago
11

Three students are sitting in the first row. In the second row, three students sit behind each of those students, and so on. How

many students are sitting in the fifth row?
Sorry I just don’t get it
Mathematics
1 answer:
uranmaximum [27]3 years ago
8 0

Answer:

243 students

Step-by-step explanation:

First row: 3 students

Second row: 9 students (3^2)

Third row: 27 students (3^3)

Fourth row: 81 students (3^4)

Fifth row: 243 students (3^5)

The basic logic behind this question is that each row is a "cube" --> the fifth row is 3 ^5, meaning 3 x 3 x 3 x 3 x 3 (equals 243!!)

Knowing this, you could even solve for how many kids are in, say, the 12th row. It would just be 3^12.

You might be interested in
Your office needs to deliver products to various sites in your town. You can hire a firm to make those deliveries for $200 per m
Zigmanuir [339]
Hire firm:
200+0.50*1200 each month
200+600=800

lease truck:
350+480 each month
=830

so with contracting a firm instead of leasing trucks you would save 30$ each month or 30*12=360$ each year

8 0
4 years ago
Solve for a: 5(a+5)-3=3(2-a)
ivann1987 [24]

Simplify:

5(a + 5) + -3 = 3(2 + -1a)

Reorder the terms:

5(5 + a) + -3 = 3(2 + -1a)

(5 * 5 + a * 5) + -3 = 3(2 + -1a)

(25 + 5a) + -3 = 3(2 + -1a)

Reorder the terms again:

25 + -3 + 5a = 3(2 + -1a)

Combine like terms:

]25 + -3 = 22

22 + 5a = 3(2 + -1a)

22 + 5a = (2 * 3 + -1a * 3)

22 + 5a = (6 + -3a)

Solve:

22 + 5a = 6 + -3a

To solve for variable 'a':

You have to move all terms containing A to the left, all other terms to the right.

Then add '3a' to each side of the equation:

22 + 5a + 3a = 6 + -3a + 3a

Combine like terms:

5a + 3a = 8a

22 + 8a = 6 + -3a + 3a

Combine like terms again:

-3a + 3a = 0

22 + 8a = 6 + 0

22 + 8a = 6

Add '-22' to each side of the equation.:

22 + -22 + 8a = 6 + -22

Combine like terms:

22 + -22 = 0

0 + 8a = 6 + -22

8a = 6 + -22

Combine like terms once more:

6 + -22 = -16

8a = -16

Divide each side by '8'.

a = -2

Simplify:

a = -2

Answer: a=-2

Hope I could help! :)

8 0
3 years ago
Read 2 more answers
What is the fraction between<br> 2/7 and 5/12 with the lowest denominator<br> possible?
shtirl [24]
2 x 12 24
—- = ——
7 x 12 84


5 x 7 35
— =. ——
12 x 7 84



24 divided by 12 2
—- = ——
84 divided by 12 7



35 divided by 7 5
—- = —-
84 divided by 7 12


(i hope i did this right)
7 0
4 years ago
Which of the following sets would have a graph with an open circle on 2 and a ray pointing left on the number line?
MaRussiya [10]
Hi, the graph you describe represents all real numbers smaller than 2, without the two (that's why there's the open circle). Hence the correct answer is the third choice <span>{x | x ∈ R, x < 2}.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
</span>
8 0
4 years ago
I need help with number 29.
ratelena [41]

Answer:

f and g i think

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • I have two dice, one red and one blue. when the two dice are rolled, the probability that the number showing on the red die is l
    11·1 answer
  • -6r+7r=5 ????????????
    15·2 answers
  • Suppose the average yearly salary of an individual whose final degree is a​ master's is ​$ thousand less than twice that of an i
    7·1 answer
  • 12-x=15 <br> What does x equal?
    9·2 answers
  • A number is 12 more than the other. Find the numbers if their sum is 48.​
    14·1 answer
  • Sarita is selling lemonade in 300 millileter bottles. she made two batches of lemonade. each batch made 4.6liters of lemonade. h
    11·1 answer
  • 68=u-11<br> i need help lol pls
    12·2 answers
  • 6. A certain $400 investment is increasing 10%
    15·1 answer
  • What is the value of the discriminant? 4x2+15x=3x-9
    15·1 answer
  • The length of each side of a regular pentagon is increased by 8 inches, so the perimeter is now 65 inches. What is the original
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!