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liraira [26]
3 years ago
13

How do I do this 4+6(2x +7)

Mathematics
2 answers:
Harlamova29_29 [7]3 years ago
5 0
Use the distributive property to start off.
4+12x+42
Add like terms
12x+46

Citrus2011 [14]3 years ago
5 0
First you do the parentheses and then do want's in the outside and then add it although and 2x means multiply.
Hope this helps:)
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A TV company when purchasing thousands electronic components apply this sampling plan: randomly select 15 of them and then accep
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<h2>Answer with explanation:</h2>

According to the Binomial probability distribution ,

Let x be the binomial variable .

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The probability that the whole lot is accepted :

P(X\leq 2)=P(x=0)+P(x=1)+P(x=2)\\\\=^{15}C_0(0.03)^0(0.97)^{15}+^{15}C_1(0.03)^1(0.97)^{14}+^{15}C_2(0.03)^2(0.97)^{13}\\\\=(0.97)^{15}+(15)(0.03)^1(0.97)^{14}+\dfrac{15!}{2!13!}(0.03)^2(0.97)^{13}\\\\\approx0.63325+0.29378+0.06360=0.99063

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For sample size n= 2500

Expected value : \mu=np= (2500)(0.03)=75

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Standard deviation :  \sigma=\sqrt{np(1-p)}=\sqrt{2500(0.03)(0.97)}\approx8.53

The standard deviation = 8.53

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5 0
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