3х + 2 - 10 — 3х
terms, like terms, coefficients, and constants in each expression

3 is a coefficient

* 2and 10 are constants

*x is variable

Step-by-step explanation:

3х + 2 - 10 — 3х

*3 is a coefficient

* 2and 10 are constants

*x is variable

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