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kupik [55]
2 years ago
15

I DONT UNDERSTAND THIS I NEED HELP

Mathematics
1 answer:
musickatia [10]2 years ago
6 0

Answer:

It is -4 :)

Step-by-step explanation:

I just did this lol

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Identify the correct factor pairs for the number 20.
Nata [24]

Answer: A

Step-by-step explanation:

1x20=20

2x10=20

4x5=20

8 0
3 years ago
Read 2 more answers
On a test that has a normal distribution, a score of 60 falls two standard deviations above the mean, and a score of 42 falls on
Sergeu [11.5K]

Answer:

48

Step-by-step explanation:

Given that:

A  \ score  \ of \  60  \ falls \  two  \ standard   \ deviations \  above \  the \ mean \\ \\ A \  score \ of \ 42  \ falls \  one  \ standard  \ deviation \ below  \ the \ m ean

The interval for score = 60 - 42 = 18

If we divide it by the 3 standard deviations; the interval result into

= 18/3

= 6

So, the standard deviation is 6, and the mean = 42 + 6

= 48

7 0
2 years ago
Read 2 more answers
1.The diameter of a circle is 20m. Find the circumference to the nearest tenth
Temka [501]

Answer:

62.8

Step-by-step explanation:

The formula for circumference is 2(pi)r

Let's plug in the values.

Well, we know the diameter, and since the radius is 1/2 the diameter, but then you multiply by 2 again, you don't have to change anything. Therefore, another formula is (pi)<em>d</em>

3.14 x 20

= 62.8 is your answer. And the answer is already rounded to the nearest tenth, so nothing is left to do!

<em>Hope this helps!</em>

3 0
3 years ago
Solve the equation x^2 - 4x + 6 = 9 by completing the square.
tatuchka [14]

Hello!

x² - 4x + 6 = 9 <=>

<=> x² - 4x + 6 - 9 = 0 <=>

<=> x² - 4x - 3 = 0 <=>

<=> x = -(-4)±√(-4)²-4×1×(-3)/2×1 <=>

<=> x = 4±√16+12/2 <=>

<=> x = 4±√28/2 <=>

<=> x = 4±2√7/2 =>

=> x = 4+2√7/2 and x = 4-2√7/2 =>

=> x = 2+√7 and x = 2-√7

The equation has two solutions.

Good luck! :)

7 0
3 years ago
Read 2 more answers
1/3 of 3/4 = ____ fourth(s)
SashulF [63]

Answer:

0.99

Step-by-step explanation:

.33 x .75 = .2475 or 0.99/4

6 0
2 years ago
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