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3 years ago

Wrong answers only! + (Blank) =

Mathematics

2 answers:

zvonat [6]3 years ago

6 0

Answer:

Step-by-step explanation:

Lostsunrise [7]3 years ago

5 0

Answer:

Step-by-step explanation:

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sharmar spent at least 30 minutes playing his guitar on saturday he spent 10 minutes longer playing his guitar on saturday than

Nataly_w [17]

20 minutes
Because-

If he did ten more minutes then friday just do 30 - 10 whih 20 mins

4 0

2 years ago

18=k+12 HELPPP WHATS K

Nana76 [90]

Answer:

k=6

Step-by-step explanation:

18=k+12

you need to isolate k so you subtract 12 from both side

6=k

7 0

3 years ago

Read 2 more answers

Please help with this. i can even give brainliest!!!!

son4ous [18]

Answer: i think 10

Step-by-step explanation:

5 0

3 years ago

A market research firm supplies manufacturers with estimates of the retail sales of their products from samples of retail stores

EastWind [94]

Answer:

$(52-49) -4.300= -1.300$

$(52-49) +4.300= 7.300$

And the 95% confidence would be :

$-1.300 \leq \mu_1 -\mu_2 \leq 7.300$

Step-by-step explanation:

We have the following info given from the problem

$\bar X_1 = 52$ sample mean for this year

$s_1= 13$ sample deviation for this year

$n_1 = 75$ random sample selected for this year

$\bar X_2 = 49$ sample mean for last year

$s_2= 11$ sample deviation for last year

$n_1 = 53$ random sample selected for last year

And we want to construct a 95% confidence interval estimate of the difference μ1−μ2, where μ1 is the mean of this year's sales and μ2 is the mean of last year's sales

For this case the formula that we need to use is:

$(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}$

The degrees of freedom are given by:

$df= n_1 +n_2 -2 = 75+53-2= 126$

The confidence level is 0.95 and the significance would be $\alpha=0.05$ and $\alpha/2 =0.025$ so then the critical value for this case is :

$t_{\alpha/2}= 1.979$

The margin of error would be:

$ME = 1.979 \sqrt{\frac{13^2}{75} +\frac{11^2}{49}}= 4.300$

And the confidence interval would be given by:

$(52-49) -4.300= -1.300$

$(52-49) +4.300= 7.300$

And the 95% confidence would be :

$-1.300 \leq \mu_1 -\mu_2 \leq 7.300$

6 0

4 years ago

Detective pi is having a birthday party for the first baby rhino. the cake serves 50 people and cost $120. how much does the cak

Yuki888 [10]

See my answer to the other posting of the same question.

3 0

3 years ago

Wrong answers only! + (Blank) = ​

Wrong answers only! + (Blank) =