Write the phrase as a variable expression. Use x to represent "a number." 63 decreased by a number
A. 63 + x
B. 
C. x - 63
D. 63 - x
Answer: D
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Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. half-open interval; {x|-3 ? x < 1}; [-3, 1) B. closed interval; {x|-3 ? x ? 1}; [-3, 1] C. half-open interval; {x|-3 < x ? 1}; (-3, 1] D. open interval; {x|-3 < x < 1}; (-3, 1)
Solve the problem.To find the distance AB across a river, a distance BC of 902 m is laid off on one side of the river. It is found that angle B = 102.6° and angle 
Find AB. Round to the nearest meter.
A. 229 m B. 232 m C. 261 m D. 264 m
Graph the equation by plotting points.x = y2 
A. 
B. 
C. 
D. 
Graph the parabola.x2 = -9y
A. 
B. 
C. 
D. 