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tekilochka [14]
2 years ago
12

To conduct an experiment, researches randomly select six students from a class of 20. How many different groups of six students

are possible?
Mathematics
1 answer:
enot [183]2 years ago
8 0

Answer:

3.33

Step-by-step explanation:

20 divided by 6 equals 3.33333333333

Round that you get 3.33

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Find the x- and y- intercepts if the line that passes through the given points (-6,-6),(4,-2).
Paul [167]

Answer:

The x-intercept would be 9 and the y-intercept would be -18/5

Step-by-step explanation:

In order to find this we need to first find the slope. To do that we use the two points and the slope equation.

m (slope) = (y2 - y1)/(x2 - x1)

m = (-2 - -6)/(4 - -6)

m = 4/10

m = 2/5

Now that we have the slope, we can use that and either point to find the equation of the line in standard form.

y - y1 = m(x - x1)

y + 6 = 2/5(x + 6)

y + 6 = 2/5x + 12/5

-2/5x + y + 6 = 12/5

-2/5x + y = -18/5

-2x + 5y = -18

Now that we have this, we can find the intercepts through using 0s. First, we put a zero in for y to find the x intercept.

-2x + 5y = -18

-2x + 5(0) = -18

-2x = -18

x = 9

Therefore the x intercept is 9.

We find the y-intercept by doing the opposite. We put a 0 in for x.

-2x + 5y = -18

-2(0) + 5y = -18

5y = -18

y = -18/5

5 0
3 years ago
Read 2 more answers
A Ferris wheel is 136 feet tall. It casts a 34-foot shadow.
Brilliant_brown [7]

Answer:

6 feet

Step-by-step explanation:

This problem involves using ratios to compare side lengths in similar triangles.

136/34=x/1.5

136/34*1.5=x/1.5*1.5

136/34*1.5=x

x=6

The man is 6 feet tall

8 0
3 years ago
How many ways can three different numbers be selected from 10 numbers to open a keypad lock?
Paraphin [41]

There are 720 ways through which 3 numbers can be selected from 10 numbers to open a keypad lock.

Given that there are 10 numbers are 3 numbers are required to open a keypad lock.

Permutations are the number of ways in which objects can be selected without replacements to form subsets.

It is expressed as nP_{r}=n!/(n-r)!.

Factorial of a number is the product of consecutive numbers less than the number.

Total numbers available=10

Numbers to be selected=3

Number of ways can be found by using permutations.

Number of ways =10P_{3}

=10!/(10-3)!

=10!/7!

=10*9*8*7!/7!

=10*9*8

=720 ways.

Hence there are 720 ways through which 3 numbers can be selected from 10 numbers.

Learn more about permutations at brainly.com/question/1216161

#SPJ1

6 0
2 years ago
What does a+b-3 equall
AlladinOne [14]

It is 3ab ;).........

5 0
3 years ago
Read 2 more answers
Can someone help with this question and also give an explanation? I will give brainlest
olga2289 [7]
The answer is C, 45 in^2. 6 times 9 is 54, and the unshaded area has an area of 3 times 3, so 9. Subtract the 9 from the 54 and you get 45.
5 0
3 years ago
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