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.
Answer:
D
Step-by-step explanation:
Answer:
domain= all real numbers
Range= y>=0
Step-by-step explanation:
Answer:
D. 9
Step-by-step explanation:
We know that cos theta = adjacent / hypotenuse
cos 60 = x /18
Multiply each side by 18
18 cos 60 = x/18 * 18
18 cos 60 =x
9 =x
Answer:
The solution is (-1,-8)
Step-by-step explanation:
Equation 1 :6x−2y=10
Equation 2 : 10x−y=−2
Multiply equation 1 by 1 and Equation 2 by 2
So, Equation 1 will be : 6x-2y=10
So, Equation 2 will be : 20x-2y=-4
Subtract 1 from 2
So, 20x-2y-6x+2y=-4-10
14x=-14
x=-1
Substitute the value of x in 1
So,6(-1)-2y=10
-6-2y=10
-16=2y
-8=y
Check solution:
Substitute the values in equation 1 :
6x−2y=10
6(-1)-2(-8)=10
-6+16=10
10=10
Hence Verified
So, The solution is (-1,-8)