Answer:
6/7
Step-by-step explanation:
because there are 28 properties in all
4 of them are railroads
but we're not looking for the probability of selecting a railroad, which would be 4/28 or 1/7, but for not selecting a railroad
and 24 of them are not railroads
So the probability of not selecting a railroad is 24/28, which simplified/reduced is 6/7
Justify "<span>x2 = 25 is {±5}"
First, please write x^2, not x2.
</span><span>x^2 = 25; solve for x. Take the sqrt of both sides. Must write "plus or minus " in front of the sqrt of 25:
x^2 = 25 becomes x = plus or minus 5, so x: {-5, 5}</span>
Slope intercept form is simply

where y and x are the things we see on the graph
m is the slope
and b is the y-intercept
the y-intercept is just what y is equal to when x is 0, so right at the middle of the graph.
so just go ahead and if in!
Try this option.
Note, 1. the rules marked with blue colour, the solutions marked by red; 2. solutions are given shortly.
Answer:
which is the last choice in the question
Step-by-step explanation:
Simplify

Using the fact that 
We get


So

Multiplying numerator and denominator by
gives

=
ANSWER
Hint:
We can eliminate first choice since negative exponents still remain
We can eliminate third choice because the expression has a minus sign which is not possible
That just leaves second and fourth choices to work with