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
Vinil7 [7]
3 years ago
15

. Find the 20th term of the arithmetic sequence 15, 9, 3, -3

Mathematics
1 answer:
vova2212 [387]3 years ago
3 0

Answer:

a20 = -99

Step-by-step explanation:

hello :

the nth term in this  arithmetic sequence is : an = a1 + (n -1 )d

a1 = 15   a2 = 9       d = a2-a1 = 9-15 = -6  ( common difrence)

an = 15 + (n -1 )(-6)

an = 15+6-6n

an = -6n+21

the 20th term when n = 20 :  a20 = -6(20)+21 = -99

You might be interested in
Can you help me please?
Artist 52 [7]

Answer:

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
It requires a minimum of ____ points to make up a plane
baherus [9]

Answer:

2

Explanation: A plane contains at least three non-collinear points. If two points lie in a plane, then the line containing them lies in the plane. If two planes intersect, then their intersection is a line.

3 0
3 years ago
Read 2 more answers
Suppose a house costs $270,000 appreciates by 5% each year. In about how many years will the house be worth $350000?
Vikki [24]
350000 =  270000(1.05)^n

1.05)^n = 350000/270000 = 1.296296

n =  log 1.296296 / log 1.05 = 5.3 years answer
7 0
3 years ago
15 _2_3 = 9<br> Fill in the gaps from left to right.
ruslelena [56]
15-2x3=9 following the rule of PEMDAS
8 0
3 years ago
Read 2 more answers
2. Is (-3, -9) a solution of the equation y 3x?​
QveST [7]

Answer:

if you mean y=3x, then yes

Step-by-step explanation:

solution:

substitute s by -3, we obtain

y= 3 (-3)

y= -9

So, if x= - 3 then it's y= - 9

8 0
3 years ago
Other questions:
  • How do I figure out the volume of this image
    6·1 answer
  • Gerald is conducting an experiment with 3 possible outcomes. Kasey is conducting an experiment with 20 possible
    10·1 answer
  • 7lbs. For 4 people unit rate is
    10·1 answer
  • Jessica prepared 36 kilograms of dough after working 6 hours. How much dough did Jessica prepare if she worked for 8 hours? Assu
    9·1 answer
  • PLZ HELP ME 100 POINTS AND BRAINLEIST
    15·1 answer
  • Side of a square = 10 m; Perimeter=_____
    8·1 answer
  • What is 83 times 13?
    10·2 answers
  • Express the product of (2x+5/2) and (x-1) as a trinomial in simplest form
    13·1 answer
  • 7 = x/9 x =___ help
    5·2 answers
  • Mrs. Mathewson would like to serve her guests 3/16 of a quart of coke. If she has 7/8 of a quart of coke how many guests can she
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!