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Olenka [21]
3 years ago
7

Doris takes a survey of her class and finds that 2 of the 20 students in class are left-handed.

Mathematics
1 answer:
djyliett [7]3 years ago
6 0
Hey there, Alex!


She would expect 55 of them to be left handed.


Work: 550 / 20 = 27.5

27.5 x 2 = 55


Hope I was able to help!
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If x -6 is one factor of x^2 - 10x +24, which is the other factor?
yulyashka [42]
To get the other factor of the expression x² - 10x + 24, we can use long or synthetic division. We are given that the other factor is x - 6, so we can use that as our divisor. Our setup should look something like this:
x² - 10x + 24 ÷ x - 6
Here is the work using polynomial long division:
         <u> x     -4          </u>   
x - 6 | x² - 10x + 24
         <u> </u><span><u>x² - 6x</u>
</span>          0  - 4x + 24
               <span><u>-4x - 24</u>
</span>                          0
We can see that our quotient is x - 4, which would be the other factor of x - 6 to get x² - 10x + 24. The answer to your query is x - 4. Hope this helps and have a phenomenal day!

7 0
3 years ago
A small refrigerator is a cube with a side length of 16 inches. Use the formula S = 6s2 to find the surface area of the cube.
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6*16^2=1536 in
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The surface area of the cube is 1536 in.
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Can anyone help me I don't know how to solve this?
soldi70 [24.7K]
Set up a proportion. 6/10 = 9/x. cross multiply so x times 6 = 6x. And 10 times 9 = 90. so 6x=90. Then 90 and 6x divided by 6. which gets you x=15. The 9 ft tall elephant will cast a 15 ft shadow.
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3 years ago
Explanation about Cardinal number Carolyn relation cardinals ​
nalin [4]

Answer:

Cardinal Numbers

The cardinality of a group represents the number of objects available in that group.

The number of elements or members in a set is the cardinal number of that set. ...

For example, set A = {1, 3, 6, 9, 10, 12, 18}, the cardinal number of set A is 7.

Step-by-step explanation:

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3 years ago
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natta225 [31]

Answer:

a. 5,040 ways

b. 210 ways

Step-by-step explanation:

a) We want to pick 4 numbers out of 10 given that orders matter

If orders do matter, it will be a permutation problem

Mathematically;

n P r = n!/(n-r)!

In this case, n is 10 and r is 4

Thus, we have it that;

10 P 4 = 10!/(10-4)! = 5,040

b) if orders do not matter

It will be a combination problem

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n = 10 and r = 4

10 C 4 = 10! /(10-4)!4!

= 210

3 0
2 years ago
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