5+ 4 parentheses 3 - 1 parentheses ^ 2

To start off the equation (5+4) (3-1)² you'd have to remember the PEMDAS rule. Parentheses, Exponent, Multiplication, Division, Addition, Subtraction. You'd start this by adding 5 and 4 in the parentheses and subtracting 1 from 3 in the parentheses. This leaves you with (9) (2)². You's then square 2, leaving you with (9) (4). Finally, you'd multiply 9 and 4 to get 36.

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

step-by-step explanation: