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Vlad1618 [11]
3 years ago
15

Maya solved an equation incorrectly, as shown below: Step 1: 4x = 28 Step 2: x = 28 – 4 Step 3: x = 24 Which statement best expl

ains why Step 2 is incorrect in Maya's solution? (1 point)
A: She did not add 4 to 28.
B: She did not multiply 28 by 4.
C:She did not divide 28 by 4.
D:She did not multiply 28 four times.
Mathematics
2 answers:
sukhopar [10]3 years ago
7 0
Maya has to divide by 4, not subtract 4 <span>C:She did not divide 28 by 4. </span>
nikdorinn [45]3 years ago
4 0

Answer:

Option C - She did not divide 28 by 4.

Step-by-step explanation:

Given : Maya solved an equation incorrectly, as shown below:

Step 1: 4x = 28

Step 2: x = 28 - 4

Step 3:x = 24

To find : Which statement best explains why Step 2 is incorrect in Maya's solution?

Solution :

First we solve the expression again to find the mistake.

Step 1: 4x = 28

Step 2: x = \frac{28}{4}

Step 3: x = 7

Thus, by the above steps it is clear that she did not divide 28 by 4 in step 2.

Therefore, Option C is correct.

The required statement that best explains her mistake in steps 2 is She did not divide 28 by 4.

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. If x = 7 + 4√3 then find the value of x2<br> – 1/x2
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Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
22. Use your model to determine when the volume of oil will get down to 500 gallons.
Helen [10]

Answer:

  21.  y = 75000·0.935^t

  22.  after 74.6 days

  23.  y = 27.8112·1.18832^t

  24.  18.8% per month

  25.  1748

Step-by-step explanation:

22. It is convenient to use the graphing calculator to solve this problem. The number of days is where the exponential curve has the value 500. It is about 74.55 days. (see the first attachment)

__

23. y = 27.8112·1.18832^t (see the second attachment)

__

24. The rate of change is the difference between the base of the exponential and 1, often expressed as a percentage. The time period is the units of t.

  (1.18832 -1) × 100% ≈ 18.8% . . . . per month

__

25. Evaluating the function for t=24 gives y ≈ 1748.30425259 ≈ 1748.

_____

<em>Comment on graphing calculator</em>

A graphing calculator can make very short work of problems like these. It is worthwhile to get to know how to use one well.

8 0
3 years ago
Which of the following terms correctly describe the object below?
Ratling [72]
The correct answers are A, D, E
5 0
3 years ago
A realtor's commission is directly proportional to the selling price of a house. Mr. Wiley earned a commission of $9,200 on a ho
Salsk061 [2.6K]
<span>Mr. Wiley earned a commission of $9,200 on a house that sold for $184,000.
</span><span>At this rate, Mr. Wiley's commission be on a house that sells for $250,000 = ?
commission = price of house sold
$9,200 = $184,000 
multiply both sides with $250,000
$9,200 x </span>$250,000 = $184,000 x $250,000
when the price is $250,000, the commission will be;
($9,200 x $250,000) / $184,000 = $250,000
$2300000/$184 = $250,000
$12,500 = $250,000
Thus, the commission is $12,500.

4 0
3 years ago
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