Answer:
An example would be
(x+3)-(y+12)
The two constants are 3 and 12 (I'm assuming you meant "constant" as in the number that stands by itself and not "constatant" lol)
The two variables are x and y
The two operations are addition and subtraction
In words you could say "the quantity of x plus three minus the quantity of y plus twelve"
Answer:
(2.5+3)
Step-by-step explanation:
im not 100% sure though sorry
For the very last part, a is 29 and b is 45.
21x+14u-28would be the answer.