There are
ways of building a subset of
elements from
, so the total number of subsets you can build is

Recalling the binomial theorem, the above sum is equal to

as required.
Answer:
Step-by-step explanation:
Here you go mate
Use PEMDAS
Parenthesis,Exponent,Multiplication,Division,Addition,Subtraction
Step 1
-9 =4-(2x+3) Equation/Question
Step 2
-9 =4-(2x+3) Remove parenthesis
-9=-2x+1
Step 3
-9=-2x+1 Subtract 1
-2x=-10
Step 4
-2x=-10 Divide by 2
answer
x=5
Hope this helps
Answer:
y=-2
Step-by-step explanation:
3y+2=-2+y
subtract the 1y from both sides leaving you with 2y+2=-2
Then subtract 2 from both sides leaving you with 2y=-4
Then divide by 2 on both sides leaving you with y=-2