The statement is contradictory, because it is said that every member of the family gives a gift to every other member of the family. And from 10 members, there are just 2 exchanging. Anyway, maybe they are only 2 members exchanging the gifts at that point in time.
So, each member will exchange 9 gifts (that is 10 members total minus herself), and 2 members are exchanging gifts at that point, so 18 gifts are being exchanged.
6 = able to be divided evenly without a remainder
4 = the line between the numerator and denominator of a fraction
5 = a fraction in which the numerator is larger than or equal to the denominator
9=fractions with the same numerical value; fractions that are equal to each other
7 = a number that has more factors than just 1 and itself
1= a number that divides evenly into another number
10= an organized way of finding the prime factorization of a number
8= a number that shows part of a whole
2 =the largest factor that any given numbers have in common
3= the number under the fraction bar tells how many equal parts the whole was broken into
So, x^2 + 14 x + 49 - 4 = 0;
Then, we use the formula ( a + b )^2 = a^2 + 2ab + b^2;
We have ( x + 7 )^2 - 2^2 = 0;
Then, ( x + 7 )^2 - 2^2 = 0;
We use the formula a^2 - b^2 = ( a - b)( a + b );
We obtain ( x + 5 )( x + 9) = 0;
Then, x + 5 = 0;
x = -5;
x + 9 = 0;
x = - 9;
-5 and - 9 are the zeros of the quadratic function.
Establish a transition matrix:
![T = \left[\begin{array}{ccc}0.7&0.3\\0.5&0.5\end{array}\right]](https://tex.z-dn.net/?f=%20T%20%3D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D0.7%260.3%5C%5C0.5%260.5%5Cend%7Barray%7D%5Cright%5D%20%20)
The possible path are:
sunny -> cloudy -> cloudy -> sunny
-> sunny -> sunny
-> sunny -> cloudy -> sunny
-> sunny -> sunny
Find and add all the paths using the transition matrix T:
0.3*0.5*0.5 + 0.3*0.5*0.7 + 0.7*0.3*0.5 + 0.7*0.7*0.7 = 0.628
Answer:
Multiply, Subtract and bring down
Step-by-step explanation:
,u I took the test on edgenuity 2020
