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
Gnoma [55]
3 years ago
5

sheila has 5 times as many markers as dave together they have 18 markers. How many markers does shelia have

Mathematics
2 answers:
wel3 years ago
6 0
Shelia has 15 markers
Hatshy [7]3 years ago
3 0

15 markers is the answer


You might be interested in
Answer well for 50 points and Brainliest
Strike441 [17]

Answer:

Step-by-step explanation:

i am going to try me best ok        

the first one and the three one  

3 0
3 years ago
Read 2 more answers
Select the correct answer. Which table represents a linear function with a greater y-intercept than that of the function represe
Sladkaya [172]

Answer:

C

Step-by-step explanation:

i just know i guess

5 0
2 years ago
Read 2 more answers
What is the y intercept of the line x-2y=6
gladu [14]
Y=x-3



please can i have a brainliest
7 0
2 years ago
Read 2 more answers
Last one in math! Help Me
Andre45 [30]
I CALCULATED IT AND GOT
C) 4.29
3 0
2 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%24a%2Ba%20r%2Ba%20r%5E%7B2%7D%2B%5Cldots%20%5Cinfty%3D15%24%24a%5E%7B2%7D%2B%28a%20r%29%5E%7B
riadik2000 [5.3K]

Let

S_n = \displaystyle \sum_{k=0}^n r^k = 1 + r + r^2 + \cdots + r^n

where we assume |r| < 1. Multiplying on both sides by r gives

r S_n = \displaystyle \sum_{k=0}^n r^{k+1} = r + r^2 + r^3 + \cdots + r^{n+1}

and subtracting this from S_n gives

(1 - r) S_n = 1 - r^{n+1} \implies S_n = \dfrac{1 - r^{n+1}}{1 - r}

As n → ∞, the exponential term will converge to 0, and the partial sums S_n will converge to

\displaystyle \lim_{n\to\infty} S_n = \dfrac1{1-r}

Now, we're given

a + ar + ar^2 + \cdots = 15 \implies 1 + r + r^2 + \cdots = \dfrac{15}a

a^2 + a^2r^2 + a^2r^4 + \cdots = 150 \implies 1 + r^2 + r^4 + \cdots = \dfrac{150}{a^2}

We must have |r| < 1 since both sums converge, so

\dfrac{15}a = \dfrac1{1-r}

\dfrac{150}{a^2} = \dfrac1{1-r^2}

Solving for r by substitution, we have

\dfrac{15}a = \dfrac1{1-r} \implies a = 15(1-r)

\dfrac{150}{225(1-r)^2} = \dfrac1{1-r^2}

Recalling the difference of squares identity, we have

\dfrac2{3(1-r)^2} = \dfrac1{(1-r)(1+r)}

We've already confirmed r ≠ 1, so we can simplify this to

\dfrac2{3(1-r)} = \dfrac1{1+r} \implies \dfrac{1-r}{1+r} = \dfrac23 \implies r = \dfrac15

It follows that

\dfrac a{1-r} = \dfrac a{1-\frac15} = 15 \implies a = 12

and so the sum we want is

ar^3 + ar^4 + ar^6 + \cdots = 15 - a - ar - ar^2 = \boxed{\dfrac3{25}}

which doesn't appear to be either of the given answer choices. Are you sure there isn't a typo somewhere?

7 0
2 years ago
Other questions:
  • Brad buys two packages of mushrooms which mushrooms cost less per pound, $11.25 for 2/3 pounds and $7.99 for 1/2 pounds. Pls hel
    7·1 answer
  • When Nestor woke up, the temperature was -5*c. By noon, the temperature had increased by 9*C.
    9·2 answers
  • Determine the measures of the angles of MNO if the measures of the angles are in the ratio 2:4:6
    13·1 answer
  • What's the square root of 25000
    14·2 answers
  • Add 7 5/8 and 5 5/8 then from their sum subtract 11 5/16. Can someone help me with this..I need fast answers.
    7·1 answer
  • A business has $11,080 to spend on new laptops and tablet computers for its salespeople. The laptops cost $515 each. The tablets
    12·2 answers
  • Write a linear function f with the values f(3)=2 and f(0)=6
    7·2 answers
  • Whats 80000000000000x200000004500
    5·1 answer
  • if Lionel is selling protein bars for a fundraiser. he sold 16 bars on Saturday and 12 bars on Sunday. if each bar sold for $1.7
    10·1 answer
  • The local police department must write, on average, 5 tickets a day to keep department revenues at budgeted levels. Suppose the
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!