17) 
18) 
19) 
20) 
Step-by-step explanation:
17) The difference between a number and 8 is 11
Let number = x
then the equation will be:

Solving:


18) Nine less than a number is five.
Let number = x
then the equation will be:

Solving:

19) Seven is equal to a number plus 6
Let number = x
then the equation will be:

Solving:

20) The sum of a number and -4 is -18
Let number = x
then the equation will be:

solving:

Keywords: Algebraic Expressions
Learn more about Algebraic Expressions at:
#learnwithBrainly
Y=2x+2 easy
The slop=2/1
Y-int= (0,2)
Yes. The two theorems are equivalent statements given that the fundamental theorem of calculus is true.