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
Mumz [18]
3 years ago
7

Add the first 12 terms of this sequence: 15, 45, 135, 405, 1215, ...

Mathematics
1 answer:
UkoKoshka [18]3 years ago
7 0

Answer:

Step-by-step explanation:

a₁ = 15

a₂/a₁ = 45/15 = 3

a₃/a₂ = 135/45 = 3

...

It is a geometric sequence with a common ratio r=3.

Sum of first 12 terms = a₁·(1-r¹²)/(1-r)

= 15·(1-3¹²)/(1-3)

= 15·(-531,441)/(-2)

= 3,985,800

You might be interested in
Find X in the given figures.
Contact [7]
The correct answer is 6
7 0
3 years ago
Someone plz help because I am using my last amount of points and I don't want it to be wasted from no answer.I need help with qu
ser-zykov [4K]
Wheres the questions???
7 0
3 years ago
One kitten weighs 2 lbs 4 oz. Another kitten weighs 2 oz less. What is the combined weight of the two kittens in oz?
EastWind [94]

Answer:

70 oz

Step-by-step explanation:

You know that one kitten weighs 2 lbs 4 oz. and the other ways 2 lbs 2 oz all you need to do is add that together to get 4 lbs 6 oz then convert that into lbs (1 lbs = 16 oz)

In total the 4 lbs gets you 64 oz, then you just need to add the 6 remaining oz to get 70 lbs!

6 0
3 years ago
Read 2 more answers
Can someone answer this
givi [52]

Answer:

what grade is this lol I don't know

5 0
2 years ago
Read 2 more answers
1. A bag of 12 oranges costs $2.99. What is the cost per orange?
Reil [10]

Answer:

1- $ 0.25.

2- $ 26.25.

3- $ 1.73.

Step-by-step explanation:

1- Given that a bag of 12 oranges costs $ 2.99, to determine what is the cost per orange, the following calculation must be performed:

2.99 / 12 = X

0.249 = X

Thus, the cost of each orange is $ 0.25.

2- Given that 4 slices of pizza cost $ 10.50, to determine what is the cost of 10 slices of pizza at this rate, the following calculation must be performed:

10.5 / 4 x 10 = X

2.625 x 10 = X

26.25 = X

Thus, the cost of 10 slices of pizza is $ 26.25.

3- Given that 4 pieces of candy cost $ 0.99, to determine what is the cost of 7 pieces of candy at this rate, the following calculation must be performed:

0.99 / 4 x 7 = X

0.2475 x 7 = X

1.7325 = X

Thus, the cost of 7 pieces of candy is $ 1.73.

6 0
3 years ago
Other questions:
  • (b) Paul uses the function y = 8x + 40 to model the situation. What score does the model predict for 3 h of homework? WILL MARK
    6·1 answer
  • On a​ test, if 110 questions are answered and 38% of them are​ correct, what is the number of correct​ answers?
    7·1 answer
  • Positive fractions less than 1 ,with an interval of 1/8 between each pair of fractions
    13·1 answer
  • Write the equation in point-slope form of the line that passes through the given point and has the given slope (4,-7); m= -1/4
    13·1 answer
  • Solve the following
    11·2 answers
  • I need answers I’ll cash app 10 dollars
    13·1 answer
  • List down all the values of k<br>if; - 4≤ k ≤ 1​
    14·1 answer
  • 14. As x increases in the equation 3x – 2y = 6, the value of y
    6·1 answer
  • Show why 5/6 is not proportional to 10/15.
    5·1 answer
  • With the given information, which of these conclusions is reasonable?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!