A freight train and an express train leave towns $390$ miles apart at the same time, traveling toward one another. The freight train travels $30 \text{ mph}$ slower than the express train. They pass one another $3$ hours later. What are their speeds?

What is the slope ( or grade) of this hill?

How do you write a causal analysis?

Using the essay earlier, answer the questions below:

(a) What is the mood of the final paragraph of the essay?

(b) Which details create that mood?

Write an equation of the circle with center at $(-2,0)$ and $r=\sqrt{5}$.

Solve the following system using substitution.

$$x=6 y-2$$

$$y=\frac{4}{3} x$$

Write the equation, in slope-intercept form if possible, of the line passing through the two points.

$(-3,6)$ and $(6,12)$

Write the equation, in slope-intercept form if possible, of the line passing through the points $(6,1)$ and $(-2,5)$.

Use a calculator to approximate $\ln 0.35$. Give as many digits as the calculator displays.

Solve the following system using substitution.

$$x=3 y+5$$

$y=\frac{2}{3} x$

What is the slope (or pitch) of this roof?

Use a calculator to approximate $\ln 6$. Give as many digits as the calculator displays.

Write an equation of the circle with center at $(0,4)$ and $r=\sqrt{3}$.

Write the equation, in slope-intercept form if possible, of the line passing through the points $(5,-2)$ and $(-3,14)$.