Step-by-step explanation:
Let the length be L.
Let the breath be B.
So, we are given that
length of a rectangle is 7 inches greater than three times its width .
So, according to the Question,
L = 7+ 3B.
So, we know that:-
Area = Length× Breadth.
So, it will be
B × (7 + 3B) = Area.
So,
3B² + 7 is an expression to represent its area.
They are the opposites of each other
(-13.2)+8.1=-5.1
13.2+(-8.1)=5.1
Answer:

Step-by-step explanation:
The distance light travels in one year is known as a light year.

The closest that Earth ever gets to Jupiter is 

Hence, the distance it will take light to travel from Earth to Jupiter at this distance is 
Answer:
Step-by-step explanation: 4a³ + 24ab² - 25b³
(In other words B)