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Verizon [17]
3 years ago
14

98 POINTS!! PLEASE HELP

Mathematics
2 answers:
Y_Kistochka [10]3 years ago
4 0
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ A) The student did not expand properly for the first expression

B) (3x + 4)(2x + 5) = 6x^2 + 15x + 8x + 20 = 6x^2 +23x + 20

6x^2 + 23x + 20 = 11x + 5

Substitute 2 in:

6(2)^2 + 23(2) + 20 = 90

11(2) + 5 = 27

Lauren is incorrect as both expressions do not equal each other. When 2 is substituted, only the second expression equals 27

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

denis23 [38]3 years ago
3 0

Answer:

A) what did the student do wrong, explain why they are incorrect  

B) Demonstrate and explain the correct way to answer the question.  

Lauren says that two expressions 3x+4(2x+5) and 6x +5x +5 are equivalent. Simplify the expressions to determine whether or not Lauren is correct. Substitute a value for x to see if she is right.

<u>3x+8x+20 = 6x+5x+5</u>

<u>11x+20 = 11x+5</u>

<u>She is wrong</u>

Students answer: She is correct because both equal 11x +5. I substituted x=2 and got 27 for both

<u>She is wrong because 27 will be the answer for ' 11x+5' only. The correct method should be </u>

<u>x=-15 </u>

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

The basic simple sales equation is

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Here in the given question,

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Thus price = $x (cost) + $y (markup)

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P/90 = 4/18. What does p equal
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Can you guys help me with all 3 questions please would really appreciate it.
Temka [501]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
He lesson. If the first step in the solution of the equation -x + 6 = 5 - 3x is "subtract 5," then what should the next step be?
Xelga [282]

Answer:

  add x

Step-by-step explanation:

The operation "subtract 5" has eliminated the constant from the right side of the equation, so the next step would be to eliminate the variable from the left side. You do that by adding the opposite of the variable term.

The opposite of the term -x is x, so we "add x" as the next step.

This makes the solution look like ...

  -x +6 = 5 -3x

  -x +1 = -3x . . . . . . subtract 5

  1 = -2x . . . . . . . . . add x

  -1/2 = x . . . . . . . . .divide by -2

_____

<em>Comment on this solution</em>

My preference is always to add the opposite of the variable term with the smallest coefficient. Here, that term is -3x, so I would add 3x as a first step. This leaves the only x-term with a <em>positive</em> coefficient, so can reduce errors in the solution.

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3 years ago
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