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schepotkina [342]
3 years ago
15

No idea! Please help.

Mathematics
2 answers:
forsale [732]3 years ago
4 0
A is substracting all lengths by 2 cm
B has divided all original lengths by 1/2 cm
C decreasing every side by 1 cm
jarptica [38.1K]3 years ago
3 0
It would be option B. the scale factor is 2:1
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A group of researchers investigated the effects of bed room lighting conditions in developing eye sight problems and found that
iogann1982 [59]

Answer:

Step-by-step explanation:

From the given information:

We are to find the following:

1)

Directional hypothesis: The directional hypothesis is the groups with different bedroom lightning conditions having a different proportion of eyesight proportions.

2)

The non directional hypothesis is each group having the same proportion of eyesight problems regardless and independent of the condition of the bedroom lightning.

3)

Control group: Children that slept in darkness

4)

Experimental groups: Children that slept in night light and those that slept with lamp.

5)

Independent variable: Light condition of the bedroom

Dependent variable: Eye sight problem.

3 0
2 years ago
Would 2/5x+6/5=y be a proper answer format(i just want to know if it can be =y)
lukranit [14]

yes, it does not matter if the y is at the beginning or at the end. However, most teachers usually prefer to have the y at the beginning as it is easier to read.

6 0
3 years ago
Help me and u will get 100 points at the end
Lera25 [3.4K]

Answer:

x > 0 and y < 2

Step-by-step explanation:

By definition the inverse of a function is simply, when the domain and range are swapped. So if the domain of g(x) is x < 2 and y > 0, then the inverse will have these swapped. So x > 0 and y < 2

3 0
1 year ago
Read 2 more answers
Please find the square roots of the following complex number.
Nana76 [90]

Hey there,

First, find the square root of the given equation.

\sqrt{z}=\sqrt{81(\text{cos}(\frac{4\pi}{9})+i\text{sin}(\frac{4\pi}{9})}\\=9\text{cos}\frac{1}{2}(2k\pi+(\frac{4\pi}{9}))+i\text{sin}\frac{1}{2} (2k\pi+(\frac{4\pi}{9}))

Keep in mind that this is solved for k = 0 and 1.

Second, simplify.

=9\text{cos}(\frac{2\pi}{9})+i\text{sin}(\frac{2\pi}{9})~\text{or}~9\text{cos}(\frac{11\pi}{9})+i\text{sin}(\frac{11\pi}{9})

Best of Luck!

6 0
3 years ago
Your friend invested $500 in his shop to start off, and makes a $20 profit every week afterwards. Find the minimum number of wee
Jet001 [13]
It will take 45 weeks.25 weeks to gain back the 500 dollor he spent and 20 to make 400 dollor from it
5 0
3 years ago
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