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maks197457 [2]
3 years ago
7

What are the roots of the polynomial equation x^3-7x=6x-12?

Mathematics
1 answer:
musickatia [10]3 years ago
4 0
Hello,

Answer B

P(x)=x^3-13x+12
P(1)=1-13+12=0 ==>1 is root
P(3)=3^3-13*3+12=0 ==>3 is root
P(-4)=(-4)^3-13*(-4)+12=0 is root

P(x)=(x-1)(x-3)(x+4)

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A plumber charges 130 to start job plus 56 per hour . How many hours did she work if the total bill is 214
iragen [17]

Answer:

The plumber worked for 1.5 hours

Step-by-step explanation:

y = 130 + 56x

Substitute 214 for y in the equation

214 = 130 + 56x

-130   -130                      Subtract 130 from both sides

84 = 56x                         Divide both sides by 56

1.5 = x

4 0
3 years ago
Read 2 more answers
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Vilka [71]

Answer:

-1

Step-by-step explanation:

To find the slope given two points use the formula

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5 0
3 years ago
What is x/5+7=16 gonna be?
Margarita [4]

x=45

Step-by-step explanation:

x/5+7-7=16-7

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6 0
3 years ago
Jerry mixes the letter F P M M M D P and J thoroughly. Without looking, Amanda draws one letter. Expressed as a fraction, decima
LenKa [72]
There are 8 letters total and 1 is J
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3 0
3 years ago
A road shown measured on a map is 2.5 cm the actual distance on land is 4 km.what is the scale used.
GrogVix [38]

Answer:

Scale = 1:160000

Step-by-step explanation:

the scale used = 2.5 cm : 4 km = 2.5cm : 400000 cm

Simplify this in such a way that we are left with a ration in the form of 1:n

1: 160000

Hope this helps

4 0
3 years ago
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