Answer:
21.715 degrees
Step-by-step explanation:
There are 14 vertexes (vertices) for a 14-gon. It is 'regular' so all these angles are equal. So the exterior angle of each is 180-154.285 = 21.715 degrees.
Let A and B be disjoint, the complement of A is everything not in A and the complement of B is everything not in B. The union of the two is therefore everything that is not in A or everything that is not in B, so it must be the entire universe.
Answer:
286
Step-by-step explanation:
If the three-digit number is xyz, then:
x + y + z = 16
y = z + 2
z = 3x
Substitute the third equation into the second:
y = 3x + 2
Substitute this and the third equation into the first:
x + (3x + 2) + (3x) = 16
7x + 2 = 16
7x = 14
x = 2
y = 3x + 2 = 8
z = 3x = 6
The number is 286.
Answer:
x=2
Step-by-step explanation:
2x+x+5= 4x+3
first combine like terms, so add 2x and x which is 3x
3x+5= 4x+3
Then subtract 3x from both sides 3x-3x+5= 4x-3x+3
5= x+3
subtract 3 on both sides 5-3= x+3-3
2=x
Answer Check:
substitute x for 2
2(2)+2+5=4(2)+3
multiply 2 times 2 and add 2 which is 6 and 4 times 2 which is 8
4+5= 8+3
add the number to together to see if the two equations are equal
11 = 11
the answer is right