Yes, it is true, you can use a letter as a variable in an equation.
HOPE I HELPED!!!
When you write an equation in the form

The slope is
and the y-intercept is 
So, in the new line

the slope is 2 and the y-intercept is 3.
Answer:
the area of the parallelogram is 120 units
The correct answer is 'C'
Answer:
Step-by-step explanation: if you want to obtain the probability that x<em> </em>
-3 , then you need to add the probability for the cases x=-3 and x=-5.
p=0.13+0.17= 0.3
answer=0.3