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Semenov [28]
3 years ago
13

I need help factoring this trinomeal: 2x squared + 3x + 1

Mathematics
2 answers:
dusya [7]3 years ago
6 0
Let's start with what we know:

2 x^{2}+3x+1
And we are trying to put it into this form:

(? +/-?)(? +/- ?)

Here is what it would look like:

(2x + 1)(x + 1)

You can check you work by using the FOIL method (first, outer, inner, last)


Margarita [4]3 years ago
6 0
2x² + 3x + 1
2x² + 2x + x + 1
2x(x) + 2x(1) + 1(x) + 1(1)
2x(x + 1) + 1(x + 1)
(2x + 1)(x + 1)
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PLZZZ help with this its pretty simple!
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Answer:

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X^2+5x-6 -3x^2+7x-1

Then just combine like terms

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Also ^ followed by the number is the exponent

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Step-by-step explanation:

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4 years ago
The time between telephone calls to a cable television service call center follows an exponential distribution with a mean of 1.
Ulleksa [173]

Answer:

0.52763 is the probability that the time between the next two calls will be 54 seconds or​ less.

0.19285 is the probability that the time between the next two calls will be greater than 118.5 ​seconds.

Step-by-step explanation:

We are given the following information in the question:

The time between telephone calls to a cable television service call center follows an exponential distribution with a mean of 1.2 minutes.

The distribution function can be written as:

f(x) = \lambda e^{-\lambda x}\\\text{where lambda is the parameter}\\\\\text{Mean} = \mu = \displaystyle\frac{1}{\lambda}\\\\\Rightarrow 1.2 = \frac{1}{\lambda}\\\\\lambda = 0.84 \\f(x) = 0.84 e^{0.84 x}

The probability for exponential distribution is given as:

P( x \leq a) = 1 - e^{\frac{-a}{\mu}}\\\\P(a \leq x \leq b) = e^{\frac{-a}{\mu} -\frac{-b}{\mu}}

a) P( time between the next two calls will be 54 seconds or​ less)

P( x \leq 0.9)\\= 1 - e^{\frac{\frac{-54}{60}}{1.2}} = 0.52763

0.52763 is the probability that the time between the next two calls will be 54 seconds or​ less.

b) P(time between the next two calls will be greater than 118.5 ​seconds)

p( x > \frac{118.5}{60}) = P(x > 1.975)\\\\ = 1 - P(x \leq 1.975) \\\\= 1 -1+ e^{\frac{-1.975}{1.2}}\\\\= 0.19285

0.19285 is the probability that the time between the next two calls will be greater than 118.5 ​seconds.

6 0
4 years ago
Where did Angie make an error?
Natasha2012 [34]

Answer:

Its C because if she found the y value she needs to find the x and she plugged in the y value for x.

4 0
2 years ago
Read 2 more answers
Math question! <br> please help ASAP!
77julia77 [94]

Answer:

x = 14.04°

Step-by-step explanation:

Find x using the tangent ratio in the right triangle, that is

tan x = \frac{opposite}{adjacent} = \frac{5}{20} = \frac{1}{4}

Hence

x = tan^{-1}(0.25) = 14.04°

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4 years ago
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