The depth of a river changes after a heavy rainstorm. Its depth, in feet, is modeled as a function of time, in hours. Consider this graph of the function.

Enter the average rate of change for the depth of the river, measured as feet per hour, between hour 9 and hour 18. Round your answer to the nearest tenth.

Consider this right triangle.

Enter the ratio equivalent to sin(B).

A train travels 250 miles at a constant speed (x), in miles per hour. Enter an equation that can be used to find the speed of the train, if the time to travel 250 miles is 5 hours. (no spaces).

A student solved $\frac{3}{x-4}=\frac{x}{7}$  in six steps, as show.
Step 1:  $3=\frac{x\left(x-4\right)}{7}$  

Step 2:   $21=x\left(x-4\right)$  

Step 3:  $21=x^2-4x$  

Step 4: $0=x^2-4x-21$  
Step 5:  $0=\left(x-7\right)\left(x+3\right)$  
Step 6:  $x=-3,\ x=7$  
Which statement is an accurate interpretation of the student’s work? 

How many boxes would you click above the numbers to create a line plot for the given percent chances of rain in different cities.

65, 65, 70, 70, 80, 80, 80, 80, 85, 95, 95, 95, 100

How many above 65?

How many above 70?

How many above 80?

How many above 85?

How many above 95?

How many above 100?

Put answer in the form 65:_,70:_,80:_,85:_,95:_,100:_

Indicate which equation has infinitely many real solutions.

A.   $\frac{5}{20x}=\frac{1}{4x}$  

B.  $3x=4+5x$  

Match the recursive function with the equivalent explicit function.

Enter an expression equivalent to$\left(3x^2+2y^2-3x\right)+\left(2x+y^2-2x\right)-\left(x^2+3y^2+x\right)$ 

using the fewest number of possible terms. (use ^ as exponent)

Enter the value of x that makes the equation true.  $\sqrt{x-3}+4=7$