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
Tju [1.3M]
3 years ago
15

Rita makes and sells necklaces. The materials to make each necklace cost $2.75. Last week she made 8 necklaces and wants to make

a total profit of $78. Using the equation 8 (x + 2.75) = 78, Rita determined that she needs to sell each necklace for $7 to make a total profit of $78. Which error did Rita make?
Mathematics
1 answer:
Tresset [83]3 years ago
3 0

Answer:

The error she made was that she was adding x and 2.75. She should subtract 2.75 from x.

Another mistake that she made was that she sold each for $7 assuming that she would make a profit of 78, but she should see each necklace for $12.5 so that she could make a profit of $78.

Step-by-step explanation:

The error she made was that she was adding x and 2.75.

She should write the equation as 8 (x - 2.75) = 78; as she spends $2.75 to make a necklace.

By using the correct equation: 8 (x - 2.75) = 78

=> 8x - 22 = 78

=> 8x = 78 + 22

=> 8x = 100

=> x = 100/8

=> x = 12.5

Another mistake that she made was that she sold each for $7 assuming that she would make a profit of 78, but she should see each necklace for $12.5 so that she could make a profit of $78.

Hope this helps you.

You might be interested in
Does this set of ordered pairs represent a function? (-1,5)(0,-3)(2,7)(4,0)(7,5)
ruslelena [56]

Answer:

No

Step-by-step explanation:

You cant have 2 y values

6 0
2 years ago
Read 2 more answers
James used a substitution to solve this system of equations. Which equation could be a result of his first step? 2x+3y=12 y=x+1.
Blizzard [7]

Answer:

x = 1.5

y = 3

Step-by-step explanation:

to solve this system of equation using the substitution methods we say let

2x+3y=12................................... equation 1

y=x+1.5..................................... equation 2

substitute equation 2  into equation 1

2x+3y=12................................... equation 1

2x + 3( x + 1.5) = 12

2x + 3x + 4.5 = 12

5x + 4.5 = 12

collect the like terms

5x = 12 - 4.5

5x = 7.5

divide both sides by the coefficient of x which is 5

5x/5 = 7.5/5

x = 1.5

put x = 1.5 into equation 2

y=x+1.5..................................... equation 2

y = 1.5 + 1.5

y = 3

therefore the value of x = 1.5 and y = 3 respectively.

5 0
3 years ago
A pack or cinnamon-scented pencils sells for $4.00. What is the sales tax rate if the total cost of the pencils is $4.32?
horsena [70]
.32 because 4.00 plus .32 is 4.32
7 0
3 years ago
In a​ film, a character is criticized for marrying a woman when he is three times her age. He wittily​ replies, "Ah, but in 25ye
Sonbull [250]

Answer:age of the man: 75 age of the woman:25

Step-by-step explanation:

First, We need to define the variables

x: age of the man

y: age of the woman

at the first time he has three times her age

x=3y                (1)

in 25 years time

(x+25)=2(y+25)                 (2)

we clear the equation

X+25=2y+50

X=2y+25

we substitute in the (1) equation:

2y+25=3y

y=25

x=3*25=75

5 0
3 years ago
Read 2 more answers
(a) Select all that describe BD. B Perpendicular bisector of AC Angle bisector of LB Median of AABC Altitude of A ABC A None of
Fynjy0 [20]

a) Altitude of triangle ABC

b) Angle bisector of angle H

c) Median of triangle JKL

3 0
1 year ago
Other questions:
  • Vector vector a has a magnitude of 28 units and points in the positive y-direction. When vector vector b is added to vector a ,
    9·1 answer
  • You buy a container of cat liter $13.75 and and a bag of cat food for X dollars. The total purchase is $20.80, which includes 4%
    6·2 answers
  • megan uses 2/3 cup of almonds to make 4 cups of trail mix. Using the same proportion, how many cups of almonds would Megan need
    5·2 answers
  • Can someone explain to me taxes?
    12·1 answer
  • Factorize <br>m²-2mn+n²-9r​
    5·1 answer
  • Mr.Richardson is a sales representative for an electronics store. Each month, he receives a salary of $1800 plus a 6% commission
    5·1 answer
  • A stock has had returns of 11 percent, 18 percent, 20 percent, −13 percent, 25 percent, and −9 percent over the last six years.
    15·1 answer
  • Simplify this complex fraction (GIVE AN EXPLANATION)
    15·2 answers
  • PLEASE HELP WILL GIVE BRAINLIEST
    15·1 answer
  • What graffiti tag sounds better? Relm or Sore
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!