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swat32
2 years ago
12

A set of scores with a normal distribution has a mean of 50 and a

Mathematics
1 answer:
dimaraw [331]2 years ago
4 0
36, 43, 50, 57, 64

36 and 64 are two standard deviations out, so the empirical rule tells us 95% of scores will fall here with a normal distribution
You might be interested in
28 -4a = 3a -14+2a<br> ------
Greeley [361]
24+14 = 3a + 4a +2a
38 = 9a
——————————
Hope it is helpful.
6 0
3 years ago
Read 2 more answers
The cost of six hens and one duck at the university poultry farm is GH₵40. While four hens and three ducks cost GH₵36. What is t
Anon25 [30]

Answer:

Step-by-step explanation:

Let's call hens h and ducks d. The first algebraic equation says that 6 hens (6h) plus (+) 1 duck (1d) cost (=) 40.

The second algebraic equations says that 4 hens (4h) plus (+) 3 ducks (3d) cost (=) 36.

The system is

6h + 1d = 40

4h + 3d = 36

The best way to go about this is to solve it by substitution since we have a 1d in the first equation. We will solve that equation for d since that makes the most sense algebraically. Doing that,

1d = 40 - 6h.

Now that we know what d equals, we can sub it into the second equation where we see a d. In order,

4h + 3d = 36 becomes

4h + 3(40 - 6h) = 36 and then simplify. By substituting into the second equation we eliminated one of the variables. You can only have 1 unknown in a single equation, and now we do!

4h + 120 - 18h = 36 and

-14h = -84 so

h = 6.

That means that each hen costs $6. Since the cost of a duck is found in the bold print equation above, we will sub in a 6 for h to solve for d:

1d = 40 - 6(6) and

d = 40 - 36 so

d = 4.

That means that each duck costs $4.

3 0
3 years ago
There are 8 students on the minibus. Five of the students or boys. What fraction of the students are boys
blagie [28]
The fraction would be 5/8
3 0
3 years ago
I got 12 will someone double check me please? No links I can’t open them
Vedmedyk [2.9K]

Answer:

the first 6⅔

Step-by-step explanation:

in the image

4 0
3 years ago
What is the greatest common factor of the numerator and denominator of the rational expression below? 5x-20/x^2-2x-8
OleMash [197]
Factories both equations:
5(x - 4) / (x + 2)(x - 4)

Then take out the common brackets:
5 / x + 2

Minus 2 from both sides:
3 / x

If you are looking for the greatest common factor of the numerator and denominator, the answer would be (x - 4)
8 0
3 years ago
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