Answer:
(choice D)
Neither is the answer for the question you asked becaure x - y = 0
Answer:
Is it 2160?
Step-by-step explanation:
This is permutation
Imagine □□□□□, each □ represents a digit
For the 1st □, there are 6 choices, since "0" cannot be the first digit, or else it is not a 5-digit number
For the 2nd □, there are 6 choices (1 out of the 7 number is already used)
For the 3rd □, there are 5 choices (2 out of 7 numbers are used)
And so on.....
Therefore,
6×6×5×4×3 = 2160
The value for x is 102 degrees
First we can find the second value in the triangle by subtracting 141 from 180. This works because when added together these two angles come together to from a line (180 degrees) because this value is now known (39 degrees) we can subtract both from 180:
180-39-39= x = 102
Xz = yz
xz - yz = 0
x * z - y * z = 0
(x - y) * z = 0
So, either (x - y) = 0 or z = 0
It is given z ≠ 0, thus (x - y) = 0
x - y = 0
x = y
