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3 years ago

Which of the following are solutions to the equation below? Check all that apply. 4x2 + 4x + 1 = 9

Mathematics

1 answer:

Vilka [71]3 years ago

4 0

Answer:

4x^2 + 4x + 1=9

4x^2 + 4x - 8=0

Dividing both sides by 4

x^2 + x -2=0

It can be written as

x^2 + 2x - x - 2=0

x(x+2) -1(x+2)=0

taking (x+2) as common on LHS

Then, (x+2)(x-1)=0

Now first equate x+2=0 ie x=-2

then x-1=0 ie x=1

Therefore, x has two values(roots)

that is -2,1

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A bandleader randomly select's two students out of 100 bandmembers if you and your brother are both bandmembers what is the prob

kherson [118]

<span>There are 100 * 99 = 9900 different ways to choose two students out of 100 bandmembers. You and our brother are 2 of that ways: you being selected first and you being selected second. Therefore the probability that you two are selected is 2 / 9900 = 0,000202. You can also think as the probability of you being selected among 100 bandmembers, which is 1/100, times the probability of your brother being selected among 99 members, which is 1/99 => (1/100) * (1/99) = 1/ (100*99) = 1 / 9900; plus the same for your brother being selected first and you second => [1/9900] * 2 = 2/9900, which is the same calculated above.</span>

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3 years ago

Let p denote the current market price for widgets and let x denote a quantity of widgets. The price per widget and the daily sup

natita [175]

Answer:

$x = 52.00$

Step-by-step explanation:

Given

$Demand: p = 0.16x + 16$

$Supply: p -0.09x + 29$

Required

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<em>Hence; The equilibrium price is when x = 52.00</em>

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3 years ago

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sdas [7]

Answer:

Step-by-step explanation:

a number by itself is a constant.

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3 years ago

Find the value of x?!??????

PilotLPTM [1.2K]

Answer:

x = 31

Step-by-step explanation:

Given:

MN = 20

PQ = x

RS = 42

Required:

Value of x

SOLUTION:

In a trapezoid, the midsegment length equals the sum of both bases divided by 2

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PQ = ½(MN + RS)

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3 years ago

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Sveta_85 [38]

Answer:

When two variables are directly or indirectly proportional to each other, then their relationship can be described as y = kx or y = k/x, where k determines how the two variables are related to one another.

Step-by-step explanation:

This k is known as the constant of proportionality.

3 0

3 years ago

Which of the following are solutions to the equation below? Check all that apply. 4x2 + 4x + 1 = 9​

Which of the following are solutions to the equation below? Check all that apply. 4x2 + 4x + 1 = 9