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
Mrac [35]
3 years ago
13

Murtha has decided to start a pebble collection. She collects one pebble the first day and two pebbles on the second day. On eac

h subsequent day she collects one more pebble than the previous day. How many pebbles will she have collected at the end of the twelfth day
Mathematics
1 answer:
Musya8 [376]3 years ago
4 0

Answer:

78

Step-by-step explanation:

Given that:

First day (a) = 1

1 more pebble every subsequent day than the previous day

Tn = a + (n - 1)d

d = common difference ; difference between pebbles in two successive days = 1

n = nth day

At the end of the 12th day;

Tn = a + (n - 1)d

T(12) = 1 + (12 - 1) 1

T(12) = 1 + 11

T(12) = 12

Appling the sun if arithmetic progression formula : Sum of AP:

n/2 (a + Tn)

n = number of terms

12/2 (1 + 12)

6(13)

= 78

You might be interested in
Find the area to the nearest hundredth
Savatey [412]

Answer:

9.0586 OR

9.06

Step-by-step explanation:

IDK, used fusion 360

6 0
3 years ago
Please help out :)) and give a explanation
wolverine [178]

9514 1404 393

Answer:

  y = 3x

Step-by-step explanation:

A proportional relation has the equation ...

  y = kx

To write the desired equation, you need to know the value of k. That can be found from the given information:

  for x = 2, y = 6

  6 = k·2

  3 = k . . . . divide by 2

Now, we know the equation can be written ...

  y = 3x

5 0
3 years ago
It is a six-digit
KonstantinChe [14]
Ok, the first clue is it has six digit and the second clue is it’s a whole number!
So we know it lies between 99999 and 1000000
3rd clue tells it has only 3 different digits and 4th clue tells us each are used twice!
Moving on, 5th clue says none of its digits are even! 6th speaks none are divisible be 3
So the possibilities for digits are 1, 5, 7
And it’s greater than 600000, then the 1st digit must be 7! It is divisible be 5, so last digit must be 5!
7th clue states that It’s tenth digit is same as hundred-thousand! Means the tenth digit is 7
Let’s see what we got!
{7xxx75}
Clue no 8 as you can see says that it’s thousands digit is same as unit digit
So the number now is {7x5x75}
9th clue says it’s hundreds digit is different from tens digit meaning the hundreds digit is either 1 or 7 and we used 7 two times, so it’s 1 and clue 10 says it’s ten thousands digit is 1 so the number that’s playing hide ‘n seek or most probably riddle game is 715175!
8 0
3 years ago
WILL GIVE BRAINIEST ONLY IF YOU GET IT RIGHT!!!!
LiRa [457]

Answer:

x = 15

Step-by-step explanation:

20^2 + x^2 = 25^2

400 + x^2 = 625

subtract each side 400

it results to 225

square root 225, to equals this -->

X = 15

5 0
3 years ago
Read 2 more answers
George has two dogs.
Stella [2.4K]
Uhhhhhhhhhhhhhhhhhhhhhhhh
7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the e answer to the problem <br> 19=4p+5
    9·2 answers
  • Which of the following graphs shows a pair of lines that represent the equations with a solution (−2, 5)?
    12·1 answer
  • Slope-Intercept Form<br> someone help pls asap
    15·1 answer
  • Someone help please!! oh and pls don’t put any links
    5·1 answer
  • Suppose that from a group of 9 men, 1 will be randomly chosen for a dangerous assignment, and suppose that the chosen man will b
    9·1 answer
  • Pls help me on this i don't know what to do ​
    12·1 answer
  • how many decimeters are in 5 kilometers. please show your work by using the power of 10 to show the work its due in 12 minutes P
    12·1 answer
  • I’ll give Brainlys plzzz
    5·1 answer
  • ******90 POINTS!!*****
    12·2 answers
  • The bakers at Healthy Bakery can make 270 bagels in 10 hours. How many bagels can they bake in 15 hours? What was the rate per h
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!