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aalyn [17]
2 years ago
12

The work of a student to solve the equation 4(3x − 4) = 8 + 4x + 8 is shown below: Step 1. 4(3x − 4) = 8 + 4x + 8 Step 2. 7x − 8

= 16 + 4x Step 3. 7x − 4x = 16 + 8 Step 4. 3x = 24 Step 5. x = 8 In which step did the student first make an error and what is the correct step? (1 point) a Step 2, 12x − 16 = 16 + 4x b Step 2, 12x − 8 = 2(4 + 2x + 4) c Step 3, 7x − 4x = 16 − 8 d Step 3, 7x + 4x = 16 + 8
Mathematics
2 answers:
Ivahew [28]2 years ago
7 0

Answer:  Step 2, and correct would be a) Step 2, 12x − 16 = 16 + 4x

Step-by-step explanation:

Step 1. 4(3x − 4) = 8 + 4x + 8

Step 2. 7x − 8 = 16 + 4x

Step 3. 7x − 4x = 16 + 8

Step 4. 3x = 24

Step 5. x = 8

The student first make an error in Step 2, it should be 4 multiply the number inside the parentheses, which would be 4(3x) + 4(-4) = 8 + 4x + 8. We get 12x - 16 = 16 + 4x, which is choice a.

Tom [10]2 years ago
6 0

Answer:

wrong

Step-by-step explanation:

the student added 4x with 3 instead of multiplying

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Karl drove 619.5 miles. For each gallon of gas, the car can travel 41 miles. What is a reasonable estimate of the number of gall
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Answer:

15

Step-by-step explanation:

Calculation for What is a reasonable estimate of the number of gallons of gas Karl used

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6 0
2 years ago
The author received a total of $195,000 for the book sales. How many hardcover books were sold? Type in numbers only.
g100num [7]

Answer:

Total 390 hardcover books were sold

Step-by-step explanation:

Complete question

The author received a total of $195,000 for the book sales. How many hardcover books were sold if the cost of one hardcover book is  $500. Type in numbers only.

Solution

Given-

Total value of sale of hard cover = $195,000

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Number of books sold = Total value of sale of hard cover/Cost of one hardcover book

Number of books sold =   $195,000/$500

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Total 390 hardcover books were sold.

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3 years ago
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3 years ago
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Step-by-step explanation:

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