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Serhud [2]
3 years ago
14

Solve x2+6x=7 by completing the square.Which is the solution set of the equation?

Mathematics
1 answer:
NARA [144]3 years ago
4 0

Answer:

x = - 7, x = 1

Step-by-step explanation:

Given

x² + 6x = 7

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(3)x + 9 = 7 + 9

(x + 3)² = 16 ( take the square root of both sides )

x + 3 = ± \sqrt{16} = ± 4 ( subtract 3 from both sides )

x = - 3 ± 4

x = - 3 - 4 = - 7

x = - 3 + 4 = 1

Solution set = { - 7, 1 }

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You subtract the powers I believe? So you’d have 5 to the 6th power?
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What is x - 8y = -32
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Leon is making punch for his birthday party. First, he pours 20 cups of ginger ale into his punch bowl. Then, he adds two 64-flu
Salsk061 [2.6K]

Answer: 28 cups.

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Check my answers Please
tatuchka [14]
<u>The correct answers are:</u>
$47.50;
$24.25;
$5.75;
$123.03;
$18;
$59;
Home by $7.50; and 
separate rentals.

Explanation:
<u><em>For the first question:</em></u>
Your family purchases 2 adult tickets at $8 each; 2*8=16.  You then purchase 1 10-18 ticket for $7.25 and 1 under 10 ticket for $4.25.  You then purchase $20 in soda and popcorn.  This gives us a total of:

16+7.25+4.25+20=47.50.

<u><em>For the second question:</em></u>
You purchase your ticket for 7.25 and a ticket for each of your siblings at 4.25, which is 2*4.25=8.50.  You then purchase $10 in soda and popcorn.  This gives us a total of:

7.25+8.50+10=25.75.

The change will be:
50-25.75=24.25.

<u><em>For the third question:</em></u>
5 tickets at $16.85 each would be 5*16.85=84.25.

This gives us
90-84.25=5.75 in change.

<u><em>For the fourth question:</em></u>
7 tickets at $13.79 each will cost 7*13.79=96.53.

The handling for all 7 tickets, at $2.50 each, will be 7*2.50=17.50

These together with the shipping charge will be
96.53+17.50+9=$123.03.

<u><em>For the fifth question:</em></u>
The book of 8 tickets, which cost $5.25 each, will be 8*5.25=$42.

This will give us
60-42=$18 in change.

<u><em>For the sixth question:</em></u>
He has buy one get one free tickets; this means he will buy 3 tickets and get 3 free for the first 6 tickets. He will then need to buy the 7th ticket; this means he will pay for 4 tickets:
4*10.25=$41.

Out of $100, he will have 
100-41=$59 in change.

<u><em>For the seventh question:</em></u>
The tickets at Theatre Y cost 8.25*2=16.50.  Two drink/popcorn combos at the theatre will cost 4.50*2=9.  Together, this is 16.50+9=25.50.

The cost of the dvd rental (4.50), soda (1.50) and popcorn (2.00) at home is 4.50+1.50+2=8.  This makes staying at home the cheaper option; it is 
25.50-8=$17.50 cheaper.

<u><em>For the eighth question:</em></u>
4 separate rentals will cost 4*3.99=$15.96.  This is cheaper than $20.
7 0
3 years ago
Read 2 more answers
Solve m-13=8 please help me
pentagon [3]

Answer: 5

Step-by-step explanation:

13-8=5

5-13=8

7 0
3 years ago
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