Answer:

Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
Answer:
it’s already in it’s simplest form
Answer:
your answers are:
P= 2(l+w) units
P= 2(5)+2(9) units
P=(l+l)+(w+w) units
Step-by-step explanation:
each of these answers portray L two times for each side and W two times for each side which will give you your perimeter.
Answer:
the first function is correct
Step-by-step explanation:
I think the answer for the 3) is S=(a×ha)÷2= (7×4.2)÷2= 29,4 ÷2=14.7
And for the 5) one im really not sure.