Ask question

Ask question

All categories

2 years ago

7

A store owner paid $15 for a book. She marked up the price of the book by 40% to determine its selling price. What is the sellin

g price, in dollars, of the book?
\

1 answer:

densk [106]2 years ago

7 0

Answer:

the selling price is 21 dollars

You might be interested in

Determine if the sequence is arithmetic. If it is, find the common difference. Is the sequence a function ?

BaLLatris [955]

$6)\\r=a_{n+1}-a_n\to r=a_2-a_1=a_3-a_2=a_4-a_3=...\\\\a_1=-7;\ a_2=-10;\ a_3=-11;\ a_4=-13\\\\a_2-a_1=-10-(-7)=-10+7=-3\\a_3-a_2=-11-(-10)=-11+10=-1\\\\a_3-a_2\neq a_2-a_1\\\\\text{It's not an arithmetic sequence}$

$\r=\dfrac{a_{n+1}}{a_n}\\\\r=\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}=\dfrac{a_4}{a_3}=...\\\\8.)\\a_1=4;\ a_2=20;\ a_3=100;\ a_4=500\\\\r=\dfrac{20}{4}=\dfrac{100}{20}=\dfrac{500}{100}=5\\\\10.)\\a_1-30;\ a_2=-45;\ a_3=-50;\ a_4=-65\\\\\dfrac{a_2}{a_1}=\dfrac{-45}{-30}=\dfrac{3}{2}\\\\\dfrac{a_3}{a_2}=\dfrac{-50}{-45}=\dfrac{10}{9}\\\\\dfrac{a_2}{a_1}\neq\dfrac{a_3}{a_2}\\\\\text{It's not a geometric sequence}$
$12.)\\a_1=-7;\ a_2=-14;\ a_3=-21;\ a_4=-28\\\\\dfrac{a_2}{a_1}=\dfrac{-14}{-7}=2\\\\\dfrac{a_3}{a_2}=\dfrac{-21}{-14}=\dfrac{3}{2}\\\\\dfrac{a_2}{a_1}\neq\dfrac{a_3}{a_2}\\\\\text{It's not a geometric sequence}\\\\\text{It's a function}$

8 0

2 years ago

Isabel company offers other programs and incentives to help employees with their savings and expenses.

kogti [31]

Answer:

any picture or anything?

Step-by-step explanation:

7 0

2 years ago

PLEASE HELP ME ASAP!!! WILL MAKE YOU BRAINLIEST!!!!

pochemuha

Answer:A

Step-by-step explanation:

Taliban

4 0

2 years ago

Rewrite 5/ 16 + 6/ 20 with a common denominator.

Troyanec [42]

25/80 + 24/80 = 49/80. 16 and 20 both go into 80. !6 goes in 5 times so you multiply 5 by 5. 20 goes into 80 4 times so you multiply 4 by 4. 24/80 + 25/80 = 49/80.

5 0

2 years ago

Read 2 more answers

Find the fifth term in the geometric

OlgaM077 [116]

Answer:

<h2> a₅ = 162</h2>

Step-by-step explanation:

The nth term in the geometric sequence: $a_n=a_1\cdt r^{n-1}$

a₁ = 2 and r = 3

So:

$a_5=a_1\cdot r^4=2\cdot3^4 = 2\cdot81=162$

8 0

2 years ago