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
Help me with this one problem please :( <br> Find the following arc measures.
r-ruslan [8.4K]

Answer:

Arc KL =23

Arc OM =113

Step-by-step explanation:

We know that Angle NPM is equal to 90 degrees.

Therefore, Angle KPM is also equal to 90 degrees.

We are told that Arc LM is equal to 67.

Thus, the measure for Arc KL is equal to 90-67=23

We also know that Angle OPN is equal to Angle KPL.

Therefore, the measure of Arc ON=23

Using that information, we know that Arc OM is equal to 90+23=113

Hope I helped!

3 0
2 years ago
Morgan has 1/3 of a pond of bottle caps storend evenly in 3 boxes. How many pounds of bottles caps are in each box?
GREYUIT [131]
1/6 is the answer 1/3 time 1/3= 1/6

4 0
3 years ago
To solve the inequality m/-7&lt;(or equal to) 14 , what should be done to both sides?
Marizza181 [45]

Answer:

\large\boxed{m\geq-98}

Step-by-step explanation:

\dfrac{m}{-7}\leq14\\\\-\dfrac{m}{7}\leq14\qquad\text{change the signs}\\\\\dfrac{m}{7}\geq-14\qquad\text{multiply both sides by 7}\\\\7\!\!\!\!\diagup^1\cdot\dfrac{m}{7\!\!\!\!\diagup_1}\geq(7)(-14)\\\\m\geq-98

5 0
3 years ago
Read 2 more answers
(2x+3y-4z)-(x-y-z) combine like terms
Fittoniya [83]

Given :-

... ( 2x + 3y - 4z ) - ( x - y - z )

... 2x + 3y - 4z - x + y + z

... x + 4y - 3z is the answer.

Hope it helps!

6 0
3 years ago
1. A school store sells pencils and erasers before school opens each day. On Monday, 13 pencils and
JulsSmile [24]

Answer:

price of pencil is 0.74 and eraser is 0.72$

Step-by-step explanation:

Let, "p" represent pencils

and "e" represents erasers.

hence, according to question

13p+10e=16.75 ________(1)

and 25p+2e=19.85________(2)

Multiplying equation (2) by 5,

hence, 125p+10e=99.25________(3)

Substracting equation (3) and (1)

125p+10e-(13p+10e)=99.25-16.75

hence, 112p=82.5

p=0.74

substituting the value in equation (1),

13(0.74)+10e=16.75

9.57+10e=16.75

on solving,

e=0.72

hence, price of one pencil is 0.75$, and price of one eraser is $0.72

4 0
3 years ago
Other questions:
  • The function h(x)= 12x^8+49 is an even function. Which transformation of h(x) would result in a function that is neither even no
    7·1 answer
  • What is the slope of the line passing through the points (2,5) and (0,-4)?
    6·2 answers
  • the fabric costs $14.00 per yard if you buy 5or more yards, you can get20% off how much would 5 yards cost on sale
    15·1 answer
  • What does the holiday Thanksgiving commemorate
    10·2 answers
  • Haley has bottles that hold 678 pennies each about how many pennies does she have if she has six bottles filled with pennies
    8·2 answers
  • A car averages 27 miles per gallon. If gas costs $4.04 per gallon, which of the following is closest to how much the gas would c
    11·1 answer
  • Alex has a truck. 42% of the miles he drove last month were for work. If Alex drove 588 miles for work, how many miles did he dr
    11·1 answer
  • Solve the simultaneous equations 7 x + 4 y = 26 5 x + 4 y = 14
    12·1 answer
  • Part A:
    10·1 answer
  • In ΔEFG, the measure of ∠G=90°, the measure of ∠E=78°, and GE = 33 feet. Find the length of FG to the nearest tenth of a foot.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!