Question

1) Add : 3x+7 and x-4y+9.​

Answer 1

Answer:

A piece of string is 45 cm long. If this string is made into an equilateral triangle,

what will be the length of each side?

Step-by-step explanation:

Answer 2

Answer:

4x-4y+16

Step-by-step explanation:

just simply add this variable with same variable

and constant with constant