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
Pie
2 years ago
12

ILL GIVE BRAINLIEST! PLEASE HELP I DONT UNDERSTAND!

Mathematics
1 answer:
blsea [12.9K]2 years ago
7 0

Answer:

S₁₅ = 645

Step-by-step explanation:

The sum to n terms of an arithmetic sequence is

S_{n} = \frac{n}{2} [ 2a₁ + (n - 1)d ]

where a₁ is the first term and d the common difference

Using the nth term formula a_{n} = 5n + 3 , then

a₁ = 5(1) + 3 = 5 + 3 = 8

a₂ = 5(2) + 3 = 10 + 3 = 13 , then

d = a₂ - a₁ = 13 - 8 = 5

Thus

S₁₅ = \frac{15}{2} [ (2 × 8) + (14 × 5) ]

     = 7.5( 16 + 70)

     = 7.5 × 86

     = 645

You might be interested in
Alicia’s family wants to save for a four-year college education for her. After some research, they estimate that the total cost
erma4kov [3.2K]

Answer:

Step-by-step explanation:

$1,100

6 0
3 years ago
What is the value of x in the equation x – y = 30, when y = 15?
slamgirl [31]
Since <span><span>−y</span></span> does not contain the variable to solve for, move it to the right side of the equation by adding <span>y</span> to both sides.<span>x=<span>y+<span>30</span></span></span>
5 0
3 years ago
Which of the points listed is the same distance from the x-axis as the point (8, 3.25)?
Akimi4 [234]
The distance of the point <span>(8, 3.25) </span>to the x-axis (the horizontal line) is 3.25.
incorrect - A.) is 4.75 away from the x-axis
This one is correct - B.) is 3.25 away from the x-axis
incorrect - C.) is 7 away from the x-axis
incorrect - D.) Actually one of the above answers it correct

Hope this helps
7 0
3 years ago
Use multiplication to find three ratios equivalent to 8:12
tatyana61 [14]
Ok so 8:12 can be 8 to 12, or 8\12

do that help?
4 0
3 years ago
Read 2 more answers
Which of the following is true about indexes and scales?
Basile [38]

Answer: The following statement is true about indexes and scales: <em><u>They rank-order the units of analysis in terms of specific variables.</u></em>

<u><em>Indexes</em></u> provides with a way to make a complex measure that iterate consequence for multiple rank-ordered related questions or statements.  

<u><em>Scale</em></u> is a type of complex measurement that is combined of several items that have a empirical structure among them.

8 0
3 years ago
Other questions:
  • If a ray lays in a plane, how many points of the ray are also in the plane?
    12·2 answers
  • Can I use this for my homework for science because am a little girl trying to get an A+ I hope you understand cuz I want a free
    12·1 answer
  • Helpppppppp<br><br><br><br><br> What is the solution to the equation below?
    12·1 answer
  • The formula for calculating power is work divided by time (power = work ÷ time). What are two ways of stating the same relations
    10·2 answers
  • Which of these is always the largest?
    8·2 answers
  • Help plz
    10·1 answer
  • The first five terms in a pattern are shown below. -0.5, -0.25, 0 , 0.25, 0.5, . . . Which equation represents the pattern?
    5·1 answer
  • Tony is using these numbers 13,1,5,8 to make a new number?
    7·1 answer
  • The value of my coins if I have p pennies, n nickels and twice as many quarters as pennies.
    5·1 answer
  • For what value of x is line m parallel to line n?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!