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puteri [66]
3 years ago
8

Madeline was completing the square, and her work is shown below. Identify the line where she made her mistake. f(x) = 3x2 + 6x −

7 Line 1: f(x) = 3(x2 + 2x) − 7 Line 2: f(x) = 3(x2 + 2x + 1) − 7 − 1 Line 3: f(x) = 3(x + 1)2 − 8
Mathematics
2 answers:
matrenka [14]3 years ago
4 0

Answer:

Madeline made a mistake in LINE 2

Step-by-step explanation:

We are given:

f(x) = 3x² + 6x − 7

Line 1: f(x) = 3(x² + 2x) − 7

Line 2: f(x) = 3(x² + 2x + 1 - 1) - 7

                 = 3(x²+2x+1)  -7 - 3

But Madeline wrote it 3(x² + 2x + 1) − 7 − 1

So, she made a mistake here

Line 3: f(x) = 3(x + 1)² − 10

So, Madeline made a mistake in LINE 2 and because of this LINE 3 was also wrong

Archy [21]3 years ago
3 0
In line two, Madlime added positive one in the bracket, but subtracted one outside of the bracket without considering the factor outside of the bracket. Therefore, line 2 should be f(x)=3(x2+2x+1-1)-7
Line 3: f(x)=3(x+1)2-7-3
Line 4: f(x)=3(x+1)2-10
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Answer:

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Step-by-step explanation:

For some number of wins (W), ties (T), and losses (L), the player's score will be ...

  score = 2.2W +0.25T -3L

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4 0
2 years ago
Jose worked n hours at 8.75 dollars per hour he made a total of $61.25 write an expression that represents the total number of h
Nitella [24]

Answer:

n = P/8.75

Step-by-step explanation:

Jose’s pay (P) depends on the number (n) of hours he works.

P = 8.75n     Divide both sides by 8.75

n = P/8.75

=====

P = $61.25

n = 61.25/8.75

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8 0
3 years ago
12<br> The value of x must be greater than<br><br> a .0<br> B.1<br> C.3<br> D.7
Likurg_2 [28]

Answer:

must be greater than 7

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using pythagoras theorem

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take square root both sides

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7 0
3 years ago
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masya89 [10]

Step-by-step explanation:

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4 0
2 years ago
(6·X)+3
Sunny_sXe [5.5K]
I bieleve it would be c
8 0
3 years ago
Read 2 more answers
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