Which expression is equivalent to 2x - 17?
A)
-17 + 2x
B)
-2x + 17
C)
-2x - 17
D)
17 + 2x

Question

Which expression is equivalent to 2x - 17?
A)
-17 + 2x	
B)
-2x + 17	
C)
-2x - 17	
D)
17 + 2x

welshfella · Answer

these expressions are commutative - that means they can be moved around. But don't forget to move the sign with them.

anonymous · Answer

so D?

welshfella · Answer

an example would be 

-a + b = b - a
these 2 are equavalent

welshfella · Answer

No  because in your question the 17 has a negative in front of it. Its negative 17  not 17.

anonymous · Answer

oh so a

welshfella · Answer

Yes
note the 2x as a + before it.

in the question 2x really means + 2x but the + is not written if its at the beginning.

anonymous · Answer

thx

welshfella · Answer

yw

anonymous · Answer

Workers on the assembly line produce 4x + 6 boats each day. Which expression shows how many boats they produced in 12 days?
A)
12(4x + 6)	
B)
12(4x) + 6	
C)
12
4x+6
D)
4x+6
12

anonymous · Answer

plz help me on this one @welshfella

welshfella · Answer

Hint:  the whole expression  (4x + 6) needs to be multiplied by 12.

anonymous · Answer

so a?

welshfella · Answer

yes

the 4x + 6 is placed in parentheses to show that the whole expression must be multiplied by 12

anonymous · Answer

thx