Answer:
<h2>13/21</h2>
Step-by-step explanation:
Givens:
- There are 21 students in total.
- 8 students take Art,
- 7 students take Music.
- 2 students take both.
So, in the problem, we have two sets labeled as Art and Music, and an intersection between these two sets.
To answer the question we have to consider that it's asking about a probability of one or another, when that happens, we actually need to find the probability of the union of both sets, which is defined as:

This means that the probability of students that takes either Art or Music, refers only to those that only are in those courses, not in the intersection, that's why it has to be subtracted:

Therefore, the right answer is 13\21.
Remember that the probability including "or", refer to the probability of the union of sets, from which must be subtract the intersection.
Heres what we know
X=2006 goals
y= 2007 goals
497 = X +Y which can be arranged to be y= 497 - x
y= 37 + x
soooo..
we make the y equations equal to each other
37 + x = 497 - x
2x = 460
x= 230
now plug that back into the original equation to check
y = 37 + (230)
y = 267
so in 2006 (remember x represents 2006 goals) she made 230 goals
Divide m (miles) by h (hours) to get your answer
85/5=17
Answer is B
Factoring an expression involves rewriting the expression in simplier form
The factored expression of
is 
<h3>How to factor the expression</h3>
The expression is given as:

Factor out 5x from the expression

Factor out y^2 from the expression

Hence, the factored expression of
is 
Read more about factorized expressions at:
brainly.com/question/723406
Answer:
4
Step-by-step explanation:
- 6x+4=12+4x
- 6x-4x=12-4
- 2x=8
- x=4