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
olga55 [171]
4 years ago
6

Celia uses the steps below to solve the equation Negative StartFraction 3 over 8 EndFraction (negative 8 minus 16 d) + 2 d = 24.

Step 1 Distribute Negative StartFraction 3 over 8 EndFraction over the expression in parentheses. 3 minus 16 d + 2 d = 24 Step 2 Simplify like terms. 3 minus 14 d = 24 Step 3 Subtract 3 from both sides of the equation. Negative 14 d = 21 Step 4 Divide both sides of the equation by –14. D = StartFraction 21 over negative 14 EndFraction = Negative three-halves = negative 1 and one-half Which corrects the error in the step in which Celia made the first error?
Mathematics
2 answers:
Leviafan [203]4 years ago
6 0

Answer:

The answer is B

pls mark brainlliest

Stels [109]4 years ago
5 0

Answer:

Celia made the first error in the Step 1

<h3><u>Celia's error in step 1 is  </u></h3>

Distribute Negative Start Fraction 3 over 8 End Fraction over the expression in parentheses. -\frac{3}{8}(-8)-\frac{3}{8}(-16d)+2d=24

3-16d+2d=24

<h3><u>The corrected step 1 is </u></h3>

By using the distributive property a(x+y)=ax+ay  

Step 1 -\frac{3}{8}(-8)-\frac{3}{8}(-16d)+2d=24

3+6d+2d=24

Step-by-step explanation:

Celia uses the equation is  Negative Start Fraction 3 over 8 End Fraction (negative 8 minus 16 d) + 2 d = 24.

It can be written as

<h3> Now Celia uses the steps below to solve the given equation :</h3>

-\frac{3}{8}(-8-16d)+2d=24

Step 1 Distribute Negative Start Fraction 3 over 8 End Fraction over the expression in parentheses. -\frac{3}{8}(-8)-\frac{3}{8}(-16d)+2d=24

       3-16d+2d=24

Step 2 Simplify like terms 3-14d=24

Step 3 Subtract 3 from both sides of the equation 3-14d-3=24-3

Step 4 -14d=21

Step 5 d=\frac{21}{-14}

Step 6 d=-(\frac{-3}{2})

Step 7 d=-(1\frac{1}{2})

<h3>The corrected steps are</h3>

-\frac{3}{8}(-8-16d)+2d=24

By using the distributive property a(x+y)=ax+ay  

Step 1 -\frac{3}{8}(-8)-\frac{3}{8}(-16d)+2d=24 3+6d+2d=24

Step 2 Simplify the like terms  3+8d=24

Step 3 Subtract 3 from both sides of the equation 3+8d-3=24-3

Step 4 8d=21

Step 5 d=\frac{21}{8}

Step 6 d=2\frac{5}{8}  

<h2>Celia made the first error in the <u>Step 1 </u>Celia's error in step 1 is  </h2>

Distribute Negative Start Fraction 3 over 8 End Fraction over the expression in parentheses. -\frac{3}{8}(-8)-\frac{3}{8}(-16d)+2d=24

       3-16d+2d=24

<h2><u>The corrected step 1 is </u></h2>

By using the distributive property a(x+y)=ax+ay  

Step 1 -\frac{3}{8}(-8)-\frac{3}{8}(-16d)+2d=24

3+6d+2d=24

You might be interested in
Solve by the substitution method. <br> 6x + 8y = 0 <br> -7x + y = 31
jekas [21]

Answer:

(-4, 3)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

6x + 8y = 0

-7x + y = 31

<u>Step 2: Rewrite Systems</u>

-7x + y = 31

  1. Add 7x to both sides:                    y = 7x + 31

<u>Step 3: Redefine Systems</u>

6x + 8y = 0

y = 7x + 31

<em />

<u>Step 4: Solve for </u><em><u>x</u></em>

<em>Substitution</em>

  1. Substitute in <em>y</em>:                    6x + 8(7x + 31) = 0
  2. Distribute 8:                        6x + 56x + 248 = 0
  3. Combine like terms:           62x + 248 = 0
  4. Isolate <em>x </em>term:                     62x = -248
  5. Isolate <em>x</em>:                              x = -4

<u>Step 4: Solve for </u><em><u>y</u></em>

  1. Define equation:                    -7x + y = 31
  2. Substitute in <em>x</em>:                       -7(-4) + y = 31
  3. Multiply:                                  28 + y = 31
  4. Isolate <em>y</em>:                                 y = 3
7 0
3 years ago
Amilia sent an equal number of messages each day for one week. At the end of the week, she had sent 490 messages!! How many mess
almond37 [142]

Answer:Number of messages sent everyday =70 messages

Step-by-step explanation:

Total Number of messages sent in a week = 490

since she sends equal amount of messages everyday, we have that

1 week = 7 days

Number of messages sent everyday = 490/ 7 = 70 messages

4 0
3 years ago
Luke puts $35 in his savings account every month. Use a calculator to find how much money he will save in a year.
irakobra [83]
So if he Puts 35$ every Month for 12 months Is 35x12 = 420 for A year
8 0
3 years ago
Read 2 more answers
Use the order of operations -5 + 3(7.2 - 3.2)
Sedbober [7]

Answer:

-5 + 3(7.2 - 3.2) equals 7.

Step-by-step explanation:

The order of operations states the order in which different mathematical operations should be done first, you can use the mnemonic PEMDAS to remember the order to complete each operation. PEMDAS states that the order must be followed as Parenthesis, Exponents, Multiplication/Division, and Addition/Subtraction. In the expression -5 + 3(7.2 - 3.2), the three mathematical operations being used are subtraction, multiplication, and parenthesis, so based on PEMDAS, the order to complete them is parenthesis, multiplication, and subtraction. -5 + 3(7.2 - 3.2) = -5 + 3(4) = -5 + 12 = 7, so that is your final answer.

5 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=3a%20-%202%20-%20b%20-%20a" id="TexFormula1" title="3a - 2 - b - a" alt="3a - 2 - b - a" align
Stells [14]

Answer:

2a  -b -2

Step-by-step explanation:

3a -2 - b- a

Combine like terms

3a -a   -b   -2

2a  -b -2

4 0
4 years ago
Other questions:
  • An alarm salesman sold 28 alarm systems,if each alarm costs 234$ how much money did he make?
    15·1 answer
  • If you have a budget of $180 to spend on shirts and pants, what is the greatest number of shirts and pants you can buy if the ra
    8·1 answer
  • Evaluate this function when f(x) x=3
    14·1 answer
  • The school principal orders 6 new chalkboard for each grade. There are 3 grades in the school. Each new chalkboard cost $98. Wha
    10·2 answers
  • Mickey used these calculations to find how much he would spend on 7 cartons of eggs, if 12 cartons of eggs cost $22.20. Describe
    11·1 answer
  • 7x-4(6-x)+12 if x = 6
    15·1 answer
  • Find the value of cos(θ) for an angle θ in standard position with a terminal Ray that passes through the point (-5,-12)
    15·2 answers
  • Find the rate of change
    6·1 answer
  • When subtracting 12 from three times the sum of 8 and a number, you get half of that number. Write and solve the equation for th
    7·1 answer
  • 7. In the diagram, line fis parallel to line g, and line e intersects lineſ and g.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!