A letter or symbol is used to represent an unknown quantity
6 penalties/8 penalties
16 min/21.3
A. $90
150 x .40= 60
150-60=90
Answer:
82
Step-by-step explanation:
solve a + (3a) + (a + 100)=510
Answer:
3: 
4: 
Step-by-step explanation:
Question 3 can be re-written as:

which equals:

Question 4 can be re-written as:

Doing the first 2 brackets gives us:

Expanding these two:

Simplifying it:
