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mrs_skeptik [129]
3 years ago
7

What are the solutions to x2 + 8x + 7 = 0

Mathematics
2 answers:
Nezavi [6.7K]3 years ago
8 0
x^{2} +8x+7=0
Product=7
sum=8
x^{2} +x+7x+7=0
x(x+1)+7(x+1)=0
(x+7)(x+1)=0
x=-7, -1
3241004551 [841]3 years ago
6 0
X^2 + 8x + 7 = 0
x^2 + 7x + x + 7 = 0
x(x + 7) + 1(x + 7) = 0
(x + 7) (x + 1) = 0

x = -7      or       x = -1
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Stella [2.4K]

Answer:

The correct answer is 27

Step-by-step explanation:

- 5a - b

- 5(-6) - 3

30 - 3

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5 0
2 years ago
The size of a television is given by the length ofthe diagonal of the screen. the ratio of the height to the width of wide flat-
lbvjy [14]
The diagonal of the tv screen is given by:
 d = root ((w) ^ 2 + (h) ^ 2)
 Where,
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 h: height
 In addition we have the following relationship:
 h / w = 8/15
 Thus,
 For the width:
 d = root ((w) ^ 2 + ((8/15) w) ^ 2)
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d = root ((w) ^ 2 + ((8/15) w) ^ 2)
 
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5 0
3 years ago
Solve the system of linear equations by substitution.<br> 2x-y=3<br> x+5y=14
Arturiano [62]

Answer:

x= 29/11 or y= 25/11

Step-by-step explanation:

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x + 5y= 14 ............equation 2

Make x the subject of the formula in equation 2

x= 14 - 5y ..............equation 3

Substitute x=14 - 5y in equation 1

2(14- 5y) - y=3

28 - 10y - y=3

Collect like terms

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divide both sides by coefficient of y

-11y/-11 = -25/-11

y= 25/11

Substitute y= 25/11 in equation 3

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6 0
3 years ago
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RoseWind [281]

Answer:

The slope is 2/3

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m=2/3

6 0
2 years ago
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