Answer:
The value of pi is equal to 3.14
Then the original price was $42
Because it is half off we multiply 21 by 2 and get 42.
Answer:
Step-by-step explanation:
Given the equation
Note that
and
Combined, 
Solve the equation:
Since 
this is the solution to the equation.
Answer: -5 - (-10 )= 5
Step-by-step explanation:
The arrows on the number line stops at -5 and -10 so you subtract -5 minus -10 and get your anwser 5
Answer:100
Step-by-step explanation:
Expand
x = 150 - 0.5x
Add 0.5x to both sides
x + 0.5x = 150
Simplify x + 0.5x to 1.5x
1.5x = 150
Divide both sides by 1.5
x = 150/1.5
Simplify 150/1.5 to 100
x = 100
