Ella's motorboat can travel 25 mi/h in still water. If the boat can travel 7 miles downstream in the same time it takes to travel 3 miles upstream, what is the rate of the river's current?
What will be an ideal response?
10 mi/h
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Use the given vectors u, v, w, and z to draw the indicated vector. 
z - v
A. 
B. 
C. 
D. 
Let the function src="https://sciemce.com/media/3/ppg__cognero__2.1_Functions_and_Function_Notation__media__48e2ba62-e07e-4187-bb43-a4b7459b2c6c.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_ee0331832c7b443582a11a857" />.
be defined by 
, where x and 
are real numbers. Find
?
?
A. ?
B. ?
C. ?
D. ?
E. 
Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 2xy4
B. 2x
C. 2x2y4
D. 4xy8
Use the graph of the function to estimate the x-intercepts.y = x2 - x - 6
A. x = -1, x = -6 B. x = -2, x = 3 C. x = -3, x = 2 D. x = -3, x = -2