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
stira [4]
3 years ago
13

An arithmetic series contains 20 numbers. The first number is 102. The last number is 159. Which expression represents the sum o

f the series?
A.(20 (159-102/2)
B.(20(102+159/2)
C.20(102+159)
D.20(159-102)
Mathematics
1 answer:
Whitepunk [10]3 years ago
3 0

Answer:

Option B

Step-by-step explanation:

we know that

The sum of an arithmetic series is equal to

S=n(a1+an)/2

where

a1 is the first term

an is the last term

n is the number of terms

In this problem we have

n=20

a1=102

an=159

substitute the values in the formula

S=20(102+159)/2

You might be interested in
Kiara's birthday celebration started at 2:00 pm. She spent 46 minutes at the trampoline park, Eating cake and opening presents t
Phantasy [73]

Answer:

Im not 100% sure but I got 1.66667 so therefore I would say about 4:00 maybe? Didn't really understand lmk.

Step-by-step explanation: I added 46, 29, and 25 together which gave me 100 and i put that into minutes which gave me 1.66667 which rounds to 1.70 and so if 60 seconds is 1 hour than 2:00 plus 2 hours is 4. That's what I got out of it.

5 0
3 years ago
Mr Diaz decreased the speed of his car by 30 miles per hour over a period of 10 seconds. What is the average change in the speed
Allisa [31]
Divide 30 by 10. 30mph/10seconds = 3mph/seconds
4 0
3 years ago
Solve for x please :))
grandymaker [24]

Answer:

25

Step-by-step explanation:

90 - 65 = 25

Therefore, x is 25

Thenks and mark me brainliest :))

7 0
2 years ago
In which quadrant of the coordinate plane would the point (6, −8) fall?
True [87]

Answer:

Step-by-step explanation:

8 0
2 years ago
Kirstin knows that the initial fee for adopting a dog from the animal shelter is $75. This fee needs to be considered when calcu
irina [24]

Answer:

The function is represented by C(d) = 75\,USD + r\cdot d.

Step-by-step explanation:

In this case, we must observe that total cost of the dog (C(d)) is the sum of two components: i) <em>Fixed cost</em> (C_{f}) - Adoption fee, ii) <em>Variable cost</em> (C_{v}) - Daily cost of feeding the dog, both measured in US dollars.

In addition, we suppose that variable cost is directly proportional to the number of days that Kirstin owns her dog. That is:

C (d) = C_{f} + C_{v}

C(d) = C_{f} + r\cdot d

Where:

d - Number of days that Kirstin owns her dog, measured in days.

r - Daily feeding costs, measured in US dollars per day.

If C_{f} = 75\,USD, then:

C(d) = 75\,USD + r\cdot d

The function is represented by C(d) = 75\,USD + r\cdot d.

8 0
3 years ago
Other questions:
  • Mark has a board that is 12 feet long. He cuts the board into 8 peices that are the same length. How long is each peice
    15·1 answer
  • What value of c makes the statement true?
    7·2 answers
  • RT = 60 so what is RS
    15·2 answers
  • . Find the greatest number of students to whom 24 pens and
    15·1 answer
  • The school that Darryl goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 9 ad
    12·1 answer
  • Solve for x: 5 - (x + 5) &gt; -2(x + 4)
    8·1 answer
  • What is the approximate percent change in temperature that went down from 120 degrees to 100 degrees?
    15·2 answers
  • I put an imagine there please help me
    7·1 answer
  • I NEED HELP PLEASE T-T
    8·2 answers
  • Determine the central and radius of the circle of equation given below<br> x2+y2-4x+6y-12=0
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!