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3 years ago

PLEASE HELP!!!! I WILL GIVE BRAINLIEST!!!!

Mathematics

1 answer:

Vika [28.1K]3 years ago

7 0

1.not first one because Bella's rate is 3.5 and Sweet T's is 2
2. 3.5*5+11=17.5+11=28.5 -after doing 5 chores - for Bella
after 5 chores (for Sweet T's) 20
not this one
3. y =ax +b
for Sweet T: d=2c+b, (1,12), 12=2*1+b, b=10 , d=2c+10,
when c=0 ,d=10 initial saving for Sweet T
for Bella : d=3.5c+11, when c=0 , d=11 initial saving
initial saving of Bella is more 11>10
so not this one
4. so we have only one left, Bella saves per chore 3.5 and Sweet T saves per
chore 2. Bella save more per chore than Sweet T
this should should be correct answer

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Data given and notation

$\bar X=25$ represent the sample mean

$\sigma=2$ represent the sample population deviation for the sample

$n=16$ sample size

$\mu_o =24$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

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Alternative hypothesis: $\mu \neq 24$

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$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

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We can replace in formula (1) the info given like this:

$z=\frac{25-24}{\frac{2}{\sqrt{16}}}=2$

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4 years ago

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Answer:

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Step-by-step explanation:

Let the first number be x

Given second number is 6 times a first number.

If first number is x then second number is 6*x = 6x

Given third number is 100 more than the first number

If first number is x then third number is x+100 = x+100

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Given, that sum of these numbers is 812.

equating 812 with equation 1 we have,

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Therefore,

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