Question

Help! :'{






Show how changing the position of the parentheses affects the solution for the expression: 40 / 5 + 5 x (2 to the second power - 1) Show all of your work.

Answer 1

if you move them you will just add and subtract.. look
40/5 + 5x(2^2-1)
8+ 5x( 4-1)
8+5x(3)
8+ 15x
if you put the parentheses in the middle look...
now lets just make it easier..
8+ (5x+4) -1
8+ 5x + 4 -1 <-- since they are not like terms you can't add them
11+5x
now the at the first two

Answer 2

(8+5x)+4-1
8+5x+4-1
11+5x

Answer 3

thank you :]

Answer 4

no problem