Answer:
In arithmetic, variables look like letters.
Step-by-step explanation:
As we know that Mathematical arithmetic deals with numbers and certain properties with them.
Some of the main properties between numbers are as follows:
Variables do not remain constant, so we basically assign a number to a variable with an equal operator denoted by '='.
For example, let us assume a variable x being equal to 7. so it can written as:

Let suppose the value of the variable x=7 changes to x=10, then the new value will be:

Therefore, the correct answer is:
In arithmetic, variables look like letters.
Standard form: 8f + g + 18
Answer:
The required option are
Length = 4 and width = x+5
Length = 2 and width = 2x+10
Step-by-step explanation:
Area of the rectangle = Length × width
Given
Area = 4x+20
Factoring out the common terms
Area = 4x + 4(5)
Area = 4(x+5)
Length = 4 and width = x+5
This can also be written as
Area = 2(2x+10)
Length = 2 and width =2x+10
Answer:
x = 4
Step-by-step explanation:
5x + 5 = 25
-5 -5
5x = 20
---- ---
5 5
x = 4
Answer:
A:
Step-by-step explanation:

I hope this help you