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
IRISSAK [1]
3 years ago
11

The first two terms of an arithmetic

Mathematics
1 answer:
erica [24]3 years ago
8 0

Answer:

Number of term n = 12

Step-by-step explanation:

Given:

a1 = -2

a2 = 3

Sum = 306

Find:

Number of term n

Computation:

d = a2 - a1

d = 3 - (-2)

d = 5

Sn = n/2[2a + (n-1)d]

306 = n/2[2(-2) + (n-1)5]

612 = n[-4 + 5n -5]

5n² - 9n - 612 = 0

Number of term n = 12

You might be interested in
8n+16.2=1.6 what is n
creativ13 [48]
-1.825. you subtract 16.2 from 1.6. then divide that number by 8
5 0
3 years ago
Read 2 more answers
Find the perimeter....
8090 [49]

The perimeter is adding all the outside edges together:

4 + 1 +4 +1 + 3 + 1 = 14 cm.

4 0
3 years ago
A swimming pool is 25 feet wide, 20 yards long, and 7 1/2 feet deep. What is the volume of the Pool?
NNADVOKAT [17]
Just multiply all the values together but first, remember 3 YARDS = ONE FOOT
25 x 60 x 7.5 because the formula is L x W x H
The volume is 11250 feet cubed
Hope this helps!
7 0
3 years ago
Read 2 more answers
The population of Anytown is 8000. It is predicted to increase by 5% in one year. What is the predicted population after one yea
solmaris [256]
800 is what I think
8 0
3 years ago
Read 2 more answers
Geometry math question no Guessing and Please show work thank you
ahrayia [7]
To find the angle of vertex E,we need to first find the sum of interior polygons to determine x:
(number \: of \: sides - 2) \times 180
In this case,the equation would be:
(7-2)×180°
=5×180°
=900°

We can then find the value of x:
(4)6x+(2)2x+8x=900°
24x+4x+8x=900°
36x=900°
x=25°

The interior angle of vertex E:

6x=6(25)=150°

Therefore,the interior angle of vertex E is 150°.

Hope it helps!
6 0
3 years ago
Other questions:
  • Deshawn draws a regular pentagon and rotates it about its center.
    6·2 answers
  • Paper plates come in packages of 15 or 20. George bought 10 packages and had a total of 170 plates. How many of each package did
    6·1 answer
  • Which equation is shown on the graph?
    6·2 answers
  • A cylinder has a base radius of 9m and a height of 14m. What is its volume in cubic m, to the nearest tenths place?
    6·1 answer
  • 5. BOATING Boat rentals are $50 plus $4 per hour. Write an
    12·1 answer
  • A bond with an annual coupon rate of 4.8% sells for $970. what is the bond’s current yield?
    6·1 answer
  • Divide the polynomials 2x^4-3/x
    7·1 answer
  • What is a(1), also known as the first term?<br> A. a(n)=a(50) +10d (n-1)<br> B. a(n) = 50+ 10(n-1)
    9·1 answer
  • the sum of the measures of the angles of all traingles is 180. If one angle of the traingle measures of each of the other two an
    10·2 answers
  • Grade 6 math 1. Mr. Carlos bought a T-shirt for ₱ 254.95. Round this off to the nearest peso.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!