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
seropon [69]
3 years ago
10

The nth term of a sequence is n^2 -n-2 .find the sum of the first and third terms

Mathematics
1 answer:
Troyanec [42]3 years ago
8 0

Answer:

2

Step-by-step explanation:

substitute n=1 and n=3 in the given equation

1 st term is (1)^2-1-2 = 1 -1 -2 = -2

3rd term is (3)^2-3-2 = 9-3-2=4

sum of 1st and 3rd term is -2 + 4 = 2

You might be interested in
Amanda recorded the temperatures at which two oils freeze:
lianna [129]

Answer:

Peanut oil freezes at a higher temperature than olive oil because 3.1 °C > –6.1 °C.

Step-by-step explanation:

Well since 3.1 is greater than -6.1 then it should be Peanut oil freezes at a high temperature. I did the test and I got it right. I hope you do to. :)

4 0
2 years ago
Please help!
mr Goodwill [35]

Answer:

1. \sqrt{74} ft    2. 50\sqrt{2} yards     3. 5\sqrt{35} units.

Step-by-step explanation:

Pythagorean's Theorem a^2 + b^2 = c^2

A and b are both side lengths, c is the hypotenuse.

7^2 + 5^2 = 74

sqrt(74) is the answer for 1.

30^2 - 5^2 = 875

Simplify the radical. sqrt(875) --> 5sqrt(35). The answer for three.

There's a rule in geometry that says a diagonal of a square is the same length as taking a side length times the square root of two. There's your answer for two.

7 0
3 years ago
What is the equation of the line that passes through the points ( 5,-2) and (-5,0)
Novosadov [1.4K]

Answer:

y=-1/5x-1

Step-by-step explanation:

4 0
2 years ago
What is the quotient and remainder for 52 divided by 8
MariettaO [177]
When you divide 52 by 8, you have to find the nearest multiple of 8 that is either equal to or less than 52. 
closest multiple of 8 that is less than 52 is 48. Quotient is the number of times 8 is in 48. In other words 8 is there 6 times in 48. 
quotient is found by dividing the closest multiple of 8 (48) by 8.
48 / 8 = 6
quotient is 6
remainder is the difference between the number given and closest multiple
number given is 52. closest multiple is 48. difference between 52 and 48 is 
52 - 48 = 4
the remainder is 4
quotient is 6
8 0
3 years ago
Read 2 more answers
Write a linear cost function for the situation. Identify all variables used. A parking garage charges 4 dollars plus 65 cents pe
Liono4ka [1.6K]

Answer:

The linear cost function is C(x)=1.3x+4 dollar.

Step-by-step explanation:

Given : A parking garage charges 4 dollars plus 65 cents per half-hour. A linear cost function for the situation is C(x)=L.

To find : Write a linear cost function for the situation ?

Solution :

Cost function is defined as sum of marginal cost and fixed cost.

Let x be the number of hours i.e. time for which parking cost.

A parking garage charges 4 dollars plus 65 cents per half-hour.

The fixed price is $4.

Marginal cost is 65 cents per half-hour.

Converting cents into dollar,

1 cent = 0.01 dollar

65 cent = 0.65 dollar

The cost of \frac{1}{2} hour = $0.65

The cost of x hours = 0.65\times 2x

So, marginal cost is $1.3x.

Cost function is defined as

C(x)=MC+FC

C(x)=1.3x+4

C(x)=1.3x+4 dollar.

Therefore, The linear cost function is C(x)=1.3x+4 dollar where x is the number of hours.

6 0
3 years ago
Other questions:
  • 1. Find the perimeter and area of a rectangle with a length of 3.2 m and a width of 1.5 m.
    6·1 answer
  • Write the standard equation of a circle that passes through (−2, 10) with center (−2, 6).
    11·2 answers
  • Donovan eats 2 granola bars and drinks 1 glass of orange juice for breakfast every day. The price of a granola bar is B dollars
    7·2 answers
  • Any answers? No need for an explanation if you want to sure, the answer would be appreciated!
    8·1 answer
  • To use your debit card at a pay-at-the-pump system, you have to enter a four-digit personal identification number (PIN). How man
    12·1 answer
  • A video game requires at least 4 points to advance. Each solved puzzle is worth two points. Each solved riddle is worth 1 point.
    5·2 answers
  • Find the length of side x in the simplest radical form with a rational denominator​
    7·2 answers
  • Which of the following arrangement of the numbers 75, 4, 3,100 forms a proportion?
    12·1 answer
  • PLZZZZZZZZZZZZZZZZZ HELP ME I NEED HELP
    14·2 answers
  • Please help 6x + 32 = -2x
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!