Solve.A boat moves 5 kilometers upstream in the same amount of time it moves 19 kilometers downstream. If the rate of the current is 8 kilometers per hour, find the rate of the boat in still water.
A. 13
kilometers per hour
B. 8 kilometers per hour
C. 6
kilometers per hour
D. 2
kilometers per hour
Answer: A
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Solve the equation.2y4 = 72y2
A. -6, 0, 6 B. -6, 0 C. -6, 6 D. 0, 6
Identify the numerator and the denominator of the fraction.
A. numerator: 37; denominator: 1
B. numerator: 12; denominator: 25
C. numerator: 25; denominator: 12
D. numerator: 
; denominator: 1
Solve using a system of three linear equations.A real estate investor is examining a triangular plot of land. She measures each angle of the field. The sum of the first and second angles is 80° more than the measure of the third angle. If the measure of the third angle is subtracted from the measure of the second angle, the result is thrice the measure of the first angle. Find the measure of each angle. (Note: The sum of the angles of a triangle is 180°.)
A. First angle is 24°, second angle is 112°, third angle is 44° B. First angle is 26°, second angle is 106°, third angle is 48° C. First angle is 18°, second angle is 110°, third angle is 48° D. First angle is 20°, second angle is 110°, third angle is 50°
Find an equation of the line containing the given pair of points
and 
A. y = 
x
B. y = 
x + 
C. y = 
x - 
D. y = - 
x