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Stolb23 [73]
4 years ago
9

Multiply. (2x2 + 4x - 3)(x2 - 2x + 5)

Mathematics
2 answers:
BigorU [14]4 years ago
7 0
For a moment, let y=x^2-2x+5. Then by the distributive property,

(2x^2+4x-3)p=2x^2p+4xp-3p


Again by the distributive property,

2x^2p=2x^2(x^2-2x+5)=2x^4-4x^3+10x^2

4xp=4x(x^2-2x+5)=4x^3-8x^2+20x

-3p=-3(x^2-2x+5)=-3x^2+6x-15

Taking everything together, we get

(2x^2+4x-3)(x^2-2x+5)=(2x^4-4x^3+10x^2)+(4x^3-8x^2+20x)+(-3x^2+6x-15)
(2x^2+4x-3)(x^2-2x+5)=2x^4-x^2+26x-15
eduard4 years ago
4 0

Answer:

the answer is C

Step-by-step explanation:

got it right on the assignment

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guapka [62]

Answer:

x = 54

Step-by-step explanation:

These angles are complementary because they add up to 90:

x - 7 + 43 = 90

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4 years ago
Among the equation students taking a graduate statistics class, equation are master students and the other equation are doctoria
OleMash [197]

Answer:

a) P=0.2861

b) P=0.0954

c) P=0.3815

d) P=0.6185

Step-by-step explanation:

The question is incomplete:

<em>Among the N=16 students taking a graduate statistics class, A=10 are master students and the other N-A=6 are doctorial students. A random sample of n=5 students is going to be selected to work on a class project. Use X to denote the number of master students in the sample. Keep at least 4 decimal digits if the result has more decimal digits. </em>

<em> </em>

<em>a) The probability that exactly 4 master students are in the sample is closest to? </em>

<em> b) The probability that all 5 students in the sample are master students is closest to? </em>

<em> c) The probability that at least 4 students in the sample are master students is closest to? </em>

<em> d) The probability that at most 3 students in the sample are master students is closest to?</em>

<em />

We use a binomial distribution with n=5, with p=10/16=0.625 (proportion of master students).

a)

P(k=4)=\binom{5}{4}p^4q^1=5*0.625^4*0.375=5*0.1526*0.3750\\\\P(k=4)=0.2861

b)

P(k=5)=\binom{5}{5}p^5q^0=1*0.625^5*1=\\\\P(k=4)=0.0954

c)

P(k\geq4)=P(k=4)+P(k=5)=0.2861+0.0954=0.3815

d)

P(k\leq3)=1-P(x\geq4)=1-0.3815=0.6185

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4 years ago
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adoni [48]

Answer:

Step-by-step explanation:

0.0000345

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