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
Alexxx [7]
1 year ago
9

Two stores sell CDs in packages, as shown in the table below. Number of CDs in Package Cost Number of CDs in Package Cost CD Pri

ces at Store A 1 $0.70 CD Prices at Store B 1 $0.60 12 $8.40 20 ? 20 ? 30 $18.00 45 $31.50 65 $39.00 If the rate at each store is constant, which statement correctly compares the cost of a package containing 20 CDs? The cost at Store A is $2.00 greater than at Store B. The cost at Store B is $2.00 greater than at Store A. The cost at Store A is $1.00 greater than at Store B.​
Mathematics
1 answer:
sineoko [7]1 year ago
4 0

Based on their equations that models each proportional relationship for each store, the correct statement is: A.  The cost at Store A is $2.00 greater than at Store B.

<h3>How to Find the Constant Proportionality of a Proportional Relationship?</h3>

The constant of proportionality, k, is given as, y/x. The equation that models a relationship that has a constant (k), is expressed as y = kx.

The relationship between number of CDs in packages and its cost for each store is proportional because we are told the  rate at each store is constant.

Using a pair of values in each table, we can find the constant of proportionality (k) and the equation that models each table given.

Store A:

Constant of proportionality, k = y/x = 0.70/1 = 0.70

The equation for store A would be, y = 0.70x.

Store B:

Constant of proportionality, k = y/x = 0.60/1 = 0.60.

The equation for store A would be, y = 0.60x.

Find the cost of a package containing 20 CDs for store A and store D using their equations by substituting x = 20 into each of the equations:

Store A: y = 0.70(20) = $14

Store B: y = 0.60(20) = $12

The difference between both stores is: 14 - 12 = $2.

Therefore, based on their equations that models each proportional relationship for each store, the correct statement is: A.  The cost at Store A is $2.00 greater than at Store B.

Learn more about proportional relationship on:

brainly.com/question/15618632

#SPJ1

You might be interested in
Which equation can you use to find the value of x?
klemol [59]

Answer:

3x=78+(x-2)

Step-by-step explanation:

The complete question in the attached figure

we know that

The <u><em>Triangle Exterior Angle Theorem</em></u> states that: An exterior angle of a triangle is equal to the sum of the opposite interior angles.

In this problem

3x=78+(x-2)

solve for x

3x=76+x\\3x-x=76\\2x=76\\x=38^o

3 0
3 years ago
Please give answers for #1, #2, #3, and #4 please help <br> ill mark brainliest.
Ira Lisetskai [31]

Answer:

Find y output

Step-by-step explanation:

Just took test

5 0
3 years ago
Write a simplified polynomial expression in standard form to represent the area of the rectangle below.
Burka [1]
Area of Rectangle = length times width
lets say length = 2x-4
width = x+5

Note: you can switch these around, width could be 2x-4 and length could be x+5, it doesnt matter.

With that being said:
length * width = area
(2x-4)(x+5)=area
FOIL (First Outer Inner Last)
2x^{2}+10x-4x-20=area
Simplify:
x^{2}+6x-20=area
3 0
3 years ago
How are percent transmittance and absorbance related algebraically?
statuscvo [17]

Answer:

So, if all the light passes through a solution without any absorption, then absorbance is zero, and percent transmittance is 100%. If all the light is absorbed, then percent transmittance is zero, and absorption is infinite.

Absorbance is the inverse of transmittance so,

A = 1/T

Beer's law (sometimes called the Beer-Lambert law) states that the absorbance is proportional to the path length, b, through the sample and the concentration of the absorbing species, c:  


A ∝ b · c

As Transmittance, T =\dfrac{P}{P_0}

% Transmittance, \%T=100\times T

Absorbance,

A=\log_{10} \dfrac{P_0}{P}\\\\A =\log_{10}\times \dfrac{1}{T}\\\\A=\dfrac{\log_{10} 100}{\%T}\\\\A=(2 - log_{10})\times \%T

Hence, A=\log_{10}\times \dfrac{1}{T} is the algebraic relation between absorbance and transmittance.


8 0
2 years ago
Alright Soldier I need help, Solve for Percent Error, Calculate the percent error if the experimental value of the density of go
Dima020 [189]

Answer:

Step-by-step explanation:

so the steps to doing this are as follows :

Subtract the accepted value from the experimental value.

Take the absolute value of step 1.

Divide that answer by the accepted value.

Multiply that answer by 100 and add the % symbol to express the answer as a percentage.

|18.7-19.3|/19.3 = 0.031088 * 100% = 3.1%

7 0
3 years ago
Other questions:
  • What is the length of the line
    6·2 answers
  • What is the property the statement illustrates7•m=m•7?
    7·2 answers
  • Which number is prime ?<br> A : 8<br> B : 6<br> C : 13 <br> D : 10
    6·1 answer
  • hurry please if you answer this question I'll give you the brainliest the question is does the tail rotor help the helicopters t
    11·1 answer
  • The current population of Burlington, Maine, is 360 and grows at a rate of 2% per year. Which equation could be used to determin
    13·1 answer
  • Do u guys now what the answer to m + 4 = -12 is lol
    8·1 answer
  • Sam is moving bags of soil from a loading dock into a storeroom. The top soil weighs 40 pounds per bag and the mulch weighs 20 p
    8·2 answers
  • :)will mark brainliest!!!
    7·1 answer
  • The price of gas in 2020 is $1.90/gallon. What is the percent change of the price of gas if it cost $1.51/gallon in 2000?
    15·1 answer
  • Angel and Jayden were at track practice. The track is 2/5 kilometers around.  Angel ran 1 lap in 2 minutes.  Jayden ran 3 laps
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!