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3 years ago

Solve for b. 15 - 3b=63

Mathematics

2 answers:

Anika [276]3 years ago

6 0

So you have to subtract 15 from both sides than you will have -3b=63 divide u get -16

kirill115 [55]3 years ago

5 0

15-3b=63
subtract 15 from both sides
-3b=48
divide -3 from both sides
b= -16

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And replacing we got

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Step-by-step explanation:

Information given

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$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

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And replacing we got

$17.5-1.669\frac{4.2}{\sqrt{65}}=16.63$

$17.5+1.669\frac{4.2}{\sqrt{65}}=18.37$

For the 95% confidence the critical value is $t_{\alpha/2}=1.998$

$17.5-1.998\frac{4.2}{\sqrt{65}}=16.46$

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