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3 years ago

Jackie has a prepaid Green Phone that charges 22 cents per text message sent or received. Jackie prepays $40 on her phone.

Mathematics

1 answer:

anyanavicka [17]3 years ago

5 0

Hi there !

(40-6.56)/0.22 = 152

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Find the value of x. Polygon angle sums

pav-90 [236]

Answer:

x = 50

Step-by-step explanation:

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x + 10 + 2x + 3x + x = 360

7x + 10 = 360

7x = 350

x = 50

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3 years ago

Read 2 more answers

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bulgar [2K]

Answer:

H0 is accepted

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Step-by-step explanation:

Given a sample survey compared 634 randomly chosen Indians aged 15 to 25 with 567 randomly selected Asians in the same age group.

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$p_{1} = p_{2}$

Alternative hypothesis:- $p_{1} \neq p_{2}$

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The test of statistic

$z = \frac{p_{1} - p_{2}}{\sqrt{pq(\frac{1}{n_{1} }+\frac{1}{n_{2} }) } } }$

where $p = \frac{n_{1}p_{1} + n_{1}p_{2}}{n_{1}+n_{2}} = \frac{634(0.580)+567(0.229)}{634+567}$

p = 0.414

and q = 1-p = 1- 0.414 =0.586

$Z = \frac{0.580-0.229}{\sqrt{0.414(0.586)(\frac{1}{634} +\frac{1}{567} } } }$

on calculation , we get

z = 0.300 ><1.96 at 95 % level of significance

H0 is accepted

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