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3 years ago

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Sissy wants to enlarge a picture of a constellation so that she can put it on the wall in her daughter’s room. What will be the

area of the enlarged picture on the wall?
24 in.2
108 in.2
224 in.2
486 in.2

2 answers:

mezya [45]3 years ago

7 0

Answer: 486 in

Just did this on edge

Sergeu [11.5K]3 years ago

4 0

Answer:

486 in. squared

Step-by-step explanation:

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Plz help whats alex error i beg help i will give 19 points and brainlist

Alenkasestr [34]

Answer:

Alex timed 7 by 2 instead of 7 times 7 because 7^2 is an exponent.

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3 years ago

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Set A of six numbers has a standard deviation of 3 and set B of four numbers has a standard deviation of 5. Both sets of numbers

Alenkinab [10]

Given:

$\sigma_A=3$

$n_A=6$

$\sigma_B=5$

$n_B=4$

$\overline{x}_A=\overline{x}_B$

To find:

The variance. of combined set.

Solution:

Formula for variance is

$\sigma^2=\dfrac{\sum (x_i-\overline{x})^2}{n}$ ...(i)

Using (i), we get

$\sigma_A^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{n_A}$

$(3)^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$9=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$54=\sum (x_i-\overline{x}_A)^2$

Similarly,

$\sigma_B^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{n_B}$

$(5)^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$25=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$100=\sum (x_i-\overline{x}_B)^2$

Now, after combining both sets, we get

$\sigma^2=\dfrac{\sum (x_i-\overline{x}_A)^2+\sum (x_i-\overline{x}_B)^2}{n_A+n_B}$

$\sigma^2=\dfrac{54+100}{6+4}$

$\sigma^2=\dfrac{154}{10}$

$\sigma^2=15.4$

Therefore, the variance of combined set is 15.4.

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3 years ago

Please help me with this problem

OverLord2011 [107]

Answer:

v=32

Step-by-step explanation:

23-15=8x4=32

32/4+15=23

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3 years ago

Write an equation of the line

blagie [28]

Answer:

y=-3x+6

Step-by-step explanation:

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3 years ago

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Simone has 5 employees in her flower shop. Each employee works 6 4⁄15 hours per day. How many hours, in total, do the 5 employee

satela [25.4K]

Answer:

94/3 = 31.333

Step-by-step explanation:

The total hours worked = the amount of employees * hours worked

First I converted the mixed fraction 6 $\frac{4}{15}$ into $\frac{94}{15}$

Then I multiplied it by the amount of employees.

$\frac{94}{15}$ * 5 = $\frac{94}{3}$

= 31.33333

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3 years ago