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
stira [4]
3 years ago
7

A student solved the equation below. Describe the error they made. (What did they do wrong? What should they have done?) *

Mathematics
1 answer:
Zepler [3.9K]3 years ago
8 0
Error: they divided both sides by three.
correct: they should’ve first subtracted both sides by two then divided both sides by three.
You might be interested in
(-3/2)x - 9 = - 27 solve for x
aleksklad [387]

Answer:

x = 12

Step-by-step explanation:

Solve for x:

(-3 x)/2 - 9 = -27

Put each term in (-3 x)/2 - 9 over the common denominator 2: (-3 x)/2 - 9 = (-18)/2 - (3 x)/2:

(-18)/2 - (3 x)/2 = -27

(-18)/2 - (3 x)/2 = (-3 x - 18)/2:

(-3 x - 18)/2 = -27

Multiply both sides of (-3 x - 18)/2 = -27 by 2:

(2 (-3 x - 18))/2 = -27×2

(2 (-3 x - 18))/2 = 2/2×(-3 x - 18) = -3 x - 18:

-3 x - 18 = -27×2

2 (-27) = -54:

-3 x - 18 = -54

Add 18 to both sides:

(18 - 18) - 3 x = 18 - 54

18 - 18 = 0:

-3 x = 18 - 54

18 - 54 = -36:

-3 x = -36

Divide both sides of -3 x = -36 by -3:

(-3 x)/(-3) = (-36)/(-3)

(-3)/(-3) = 1:

x = (-36)/(-3)

The gcd of -36 and -3 is -3, so (-36)/(-3) = (-3×12)/(-3×1) = (-3)/(-3)×12 = 12:

Answer:  x = 12

3 0
3 years ago
Uche is a cartographer. He picks a scale to fit a map of India onto a page of an atlas. The page is 121212 by 121212 inches, wit
julsineya [31]

The scale ratio of a point A to another point B is the division of the length of B by the length of A. The best equation that models the situation is: 10.5k= 3214

The page dimension is:

Length = 12

Width = 12

The length and the width of Uche's book are equal; this means the pages of Uche's book have the shape of a square

The margin of 0.75 on either sided means the usable dimension is:

Length = 12 - 2 * 0.75 =10.5

The dimension of India is:

Length = 3214

Width =2933

The longest side in India's dimension is:

Longest = 3214

From Uche's book, the longest dimension is:

Longest = 10.5

So, the scale equation is:

k * longest length of Uche's book = longest side of India

This gives:

k * 10.5 =3214

10.5k =3214

Read more about scale ratio at:

brainly.com/question/16192120

3 0
3 years ago
Write the word sentence as an equation. Then solve the equation.
Zarrin [17]

Answer:

c = -7

Step-by-step explanation:

c + 10 = 3

subtract 10 on both sides of the equal sign

c = -7

8 0
3 years ago
Which equation describes a line that passes through the point (4, -1) and a slope of 6
umka2103 [35]

Answer:

y+1=6(x-4)

y+1=6x-24

y=6x-25

Answer: y = 6x - 25

7 0
3 years ago
Jackie sold 48 pints of lemonade at her stand. How many quarts of lemonade did she sell? (1 quart = 2 pints)
Rufina [12.5K]
OK.  Since One quart= 2 pints,  divide the number of pints (48) by 2.
48/2=24
24 is the answer for the number of quarts.
7 0
3 years ago
Read 2 more answers
Other questions:
  • A ______ is a number that is a multiple of two or more numbers
    13·1 answer
  • Explain whether the following graph represents a function. Why or why not?
    14·1 answer
  • What's the simplest form 1.4/7
    13·2 answers
  • What is the solution to 2x+y=1 and x-2y=3
    5·1 answer
  • Explain how you can use inverse operations to find 1.8 divided by 3.
    8·2 answers
  • Which is the graph of y = 3x + 1 - 2?​
    9·1 answer
  • PLEASE HELP, What is the annual interest rate she is earning on her deposit?
    6·1 answer
  • A 21-inch rope is to be cut into two pleces so that one piece is 8 inches longer than twice the other. How long is each piece, i
    14·1 answer
  • A card game requires that you have a sum of 5 in order to win. Based on the cards shown below, will Cameron win the game? Look a
    10·1 answer
  • X + 2y = 3 solve for y
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!