Equations, Expressions, and Inequalities Q&A: Get Expert Help and Learn from Real-World Examples

Table shows the number of cellular phone subscribers in the United States and their average monthly bill in the years from 2000 to 2010.
$\begin{array}{ccc}\text{Year}& \text{Subscribers}& \text{Average Local}\\ & \text{(millions)}& \text{Monthly Bill (\$)}\\ \text{2000}& \text{109.5}& \text{45.27}\\ \text{2001}& \text{128.4}& \text{47.37}\\ \text{2002}& \text{140.8}& \text{48.40}\\ \text{2003}& \text{158.7}& \text{49.91}\\ \text{2004}& \text{182.1}& \text{50.64}\\ \text{2005}& \text{207.9}& \text{49.98}\\ \text{2006}& \text{233.0}& \text{50.56}\\ \text{2007}& \text{255.4}& \text{49.79}\\ \text{2008}& \text{262.7}& \text{50.07}\\ \text{2009}& \text{276.6}& \text{48.16}\\ \text{2010}& \text{300.5}& \text{47.21}\end{array}$
One of the scatter plots clearly suggests a linear model. Use the points at $t=10$ and $t=20$ to find a model in the form $y=mx+b$.

Find x if
$203x+6=0$

$3x-3=10$. Find x.

Solve equation: $2x<1$

Solve the system of linear equations.
$x+y=27$
$y=x+3$

A sequence is generated by the recurrence relation $u_n+1=7-2u_n$
If $u_2=5$, what is the value of $u_0$?

There are 5 women and 3 men waiting on standby for a flight to New York. Suppose 3 of these 8 people are selected at random, and a random variable X is defined to be the number of women selected. Find $Pr[X=2]$.