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ozzi
4 years ago
8

FIND the number of combinations 8C2

Mathematics
1 answer:
Trava [24]4 years ago
8 0

Answer:

8c2 = 28

Step-by-step explanation:

You can plug this into your calculator (on a TI-84, it's MATH -> PRB -> 3) as 8 nCr 2.

Let's try to understand what the output means, though! The nCr function is based on Pascal's Triangle (see the attachment for a picture).

When we do 8 choose 2, we are basically thinking about having 8 possible values and 2 spots to fit them in, and we don't care about what order they're in. The probability of this is 8*7 / 2 = 28. Our answer makes sense!

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What is the exterior angle theorem and what is it’s significance for solving angles of a triangle?
AURORKA [14]

Answer:

Basically, the measure of an exterior angle of a triangle is equal to the sum of the measures of the remote interior angles. It's significance for solving angles of a triangle is the measure of angle D is equivalent to the sums of A & B.

Step-by-step explanation:

4 0
3 years ago
Y = one-fourth x minus 6 be determined? Explain.
Luden [163]

Answer:

Step-by-step explanation:

For a given function f(x), we define the domain as the set of the possible inputs of the function and the range as the set of the outputs of the function.

We will see that both domain and range are the set of all real numbers.

D = (-∞, ∞)

R = (-∞, ∞)

Here we have the function:

The first thing we need to do is find the domain.

We start by assuming that the domain is the set of all real numbers and then we try to find some given values of x that cause some undefined operation, and then we remove these values of x from the domain.

Where this would be something like a zero in the denominator or something like that. We also could have specific restrictions to the domain that are applied in some specific cases (for example if x represents a length we should remove the negative values from the domain).

Here we can see that we do not have any indetermination, thus the domain is the set of all real numbers.

Now to study the range we need to see the general function, we can see that as x tends to negative infinity y will also tend to negative infinity, while when x tends to infinity y will also tend to infinity.

Then the range will also be the set of all real numbers.

8 0
2 years ago
if the total sum of the ages of william,scott,and jim is 80years, then what was the sum of their ages five years ago?
Lady_Fox [76]
75 is my answer and this is a guess so if its right tell me
6 0
3 years ago
Read 2 more answers
The plans for a shed call for a rectangular floor with a perimeter of 294ft. The length is two times the width. Find the length
Dmitry_Shevchenko [17]
It is important to note that the perimeter is equal to 2(width) + 2(length). let's call width w and length L.

so 294 = 2w + 2L
but the length is two times the width, so L=2w.

294 = 2w + 2(2w)
294 = 2w + 4w
294 = 6w

divide both sides by 6 to solve for w.
49 = w. so our width is 49 feet.

L = 2w, so L = 2(49). L = 98.

our length is 98 feet.
6 0
4 years ago
I want to now what equals 64 please
ale4655 [162]
1 x 64=64 2 x 32=64 4 x 16 =64 8x8=64
3 0
3 years ago
Read 2 more answers
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