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
finlep [7]
3 years ago
15

An = 3n2 + 4n +5 find the first 5 terms of the following sequence

Mathematics
1 answer:
creativ13 [48]3 years ago
5 0

Answer:

              a_1=12\,,\ \ a_2=25\,\ \ a_3=44\,,\ \ a_4= 69\,,\ \ a_5= 100

Step-by-step explanation:

a_1 = 3\cdot1^2+4\cdot1+5= 3+4+5=12\\\\a_2= 3\cdot2^2+4\cdot2+5= 3\cdot4+8+5=25\\\\a_3= 3\cdot3^2+4\cdot3+5= 3\cdot9+12+5=44\\\\a_4= 3\cdot4^2+4\cdot4+5= 3\cdot16+16+5=69\\\\a_5= 3\cdot5^2+4\cdot5+5= 3\cdot25+20+5=100

You might be interested in
6x^4 • 5x^3<br><br> Pleas help<br> Me on this problem!!
Leto [7]
30x^7

Multiply the coefficients (6•5) to get 30, then add the exponents (4+3) to get 7

Hope this helps!
4 0
3 years ago
The ratio of books to magazines in the classroom is 7:3. If there are 28 books in the
ss7ja [257]

Answer:

Step-by-step explanation:

7 books.................................3 magazines

14 books.................................6 magazines

21 books................................9 magazines

28 books..............................12 magazines

of course we ca do it

7/3=28/x

x=(3*28)/7=12

6 0
2 years ago
Simplity 2(- 4)+7(x + 2).
Evgesh-ka [11]

Answer:

Step-by-step explanation:

To find your answer you first have to multiply the numbers that aren’t in parentheses and you multiply 2 and 7 and you get 14 then you  don’t have to worry about the x because it is a variable so now add  -4 +2. but first we have to turn negative into positive so you add -4 + 8

7 0
3 years ago
Mathhrjirjrrggghuughihihughhhg
marusya05 [52]

Answer:

jhliyuglkiygedrloqayfgwelJUQHAUGWDkutygsk,Hgkuyt

Step-by-step explanation:

3 0
2 years ago
Example 2
PIT_PIT [208]

Answer: (a) 314.2cm², (b) 157.1cm², (c) 78.55cm² (e) 6.77

Step-by-step explanation: (a)  Area of the circle with radius of 10 cm = πr²

                                                                          = 3.142 × 10 × 10

                                                                          = 3.142 × 100

                                                                          = 314.2cm²

The formula                                                       = πr²

(b)  Area of the half of a circle known as semicircle

                                                                         = πr²/2

                                                                         = 3.142 ×10 × 10/2

                                                                         = 3.142 × 50

                                                                         = 157.1cm²

The formula                                                      = πr²/2

(c)  A quarter of a circle is called quadrant

                                                            = πr²/4

                                                            = 3.142 × 10 × 10/4

                                                            = 314.2/4

                                                            = 78.55cm²

The formula is written thus = πr²/4, which implies that the circle is divided into 4 unit

(d) The conjecture about how to determine the area of the sector is

Formula of a sector = ∅/360(πr²)

<u>Information</u>

The arc  cant be 60°, therefore information incomplete.

(e) Area of the sector with the angle AOB of 60° = 24.

To find the radius of the angle, make v the subject of the formula from the formula.

Sector area = πr²∅/360°

equate formula to 24.

Therefore πr²∅/360° = 24

Multiply through by360° to make it a linear expression

It now becomes πr²∅ =24× 360°

                                                     r² = 24  x 360/π × ∅°

                                                     r² = 24 × 360° /3.142 × 60°

                                                     r² = 3,640/188.52

                                                     r² = 45.8

To find r , we take the square root of both side by applying laws of indicies

                                    Therefore r = √45 .8

                                                      r = 6.77

(f)   General formula = ∅°/360° × (πr²)

angle substended at centre by the arc = x°

assuming the radius of the circle = ycm, Therefore,  area of the sector = { ∅°/360° × πy² }

                                                     

                                                   

8 0
3 years ago
Other questions:
  • Mia has two whole bananas and 1/5 of another banana. Write a mixed number that represents the amount of bananas she has.
    10·1 answer
  • a ladder is leaning against a building so that the distance from the ground to the top of the ladder is 1 foot less than the len
    8·1 answer
  • Sally gave her brother $3.95 in quarters and dimes. if the number of quarters is 6 more than the number of dimes, how many quart
    11·2 answers
  • What is 15.25×45.75=
    9·2 answers
  • If I had a literal equation that was 1/2f + i = h, what would "i" equal in this equation?
    5·1 answer
  • Robert decides to repaint his ceiling, which is 14 ft by 20 ft. He wants to make sure to not paint the circular light fixture wi
    11·1 answer
  • An experiment consists of tossing a coin and drawing a card, with the card- drawing stage dependent on the results of the coin t
    10·1 answer
  • A scout troop is going hiking. They have 75 energy bars, 35 energy drinks, and 45 bottles of water. If each scout gets the same
    15·1 answer
  • Guys please i need help in this question, whoever gets it right will get a brainliest
    5·1 answer
  • Order the sides of each triangle from shortest to longest.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!