3 years ago

there are 6 times as many dogs as cAts. if tje total number of dogs and cats is 21 how many dogs are tjrre

Mathematics

1 answer:

frez [133]3 years ago

5 0

There are 18 dogs. You do 21/7.

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15 meals x $0.80 = $12.
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If one movie ticket is $3 then she must have purchased 2 with $6.

Part A - 15x0.8=18-x=x

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A candy company claims that its jelly bean mix contains 15% blue jelly beans. Suppose that the candies are packaged at random in

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Answer:

Doubtful.

Step-by-step explanation:

Our values are,

$P=0.15 \rightarrow 15\%$ Jelly Bean Mix.

The sample for us is n=200

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We can calculate with this dates the sample proportion and make he test statistic.

$p=\frac{x}{n} = \frac{40}{200} = 0.20$

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We use the formula for Test statistic, that is given by,

$z= \frac{p-P}{\sqrt{\frac{P-(1-P)}{n}}}$

$z= \frac{0.20-0.15}{\sqrt{\frac{0.15(1-0.15)}{200}}}$

$z= 1.98$

We see that our P-value: 0.048 (From the Table)

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