1) what is the property of (3+4)=(4+3)
2) what is the property of (1+2)+3=1(2+3)
3) what is the property of -3x2+4+5.3= 4+5.3+-3.2
plz

1) commutative property of addition

2)associative property of addition

3) commutative property

Step-by-step explanation:

1) You switched the numbers in the parenthesis, which in this case is 3 and 4.

2) You just moved the parenthesis which in this case is (1+2) to (2+3)

3) You switched the numbers in the equation

depends on how many days you are talking about

step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk