Express the set using set-builder notation. Use inequality notation to express the condition x must meet in order to be a member of the set.A = {12, 13, 14, 15, 16,...}

A. {x | x ? N and x ? 12}
B. {x | x ? N and x ? 12}
C. {x | x ? N and x ? 16}
D. {x | x ? N and x > 12}


Answer: B

Mathematics

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Convert to rectangular coordinates. Use exact values. ? ?

A.
B. ?
C.
D.
E.

Mathematics

List the intercepts for the graph of the equation.y = -2x

A. (-2, 0) B. (0, 0) C. (0, -2) D. (-2, -2)

Mathematics

Parametric equations and a value for the parameter t are given. Find the coordinates of the point on the plane curve described by the parametric equations corresponding to the given value of t.x = (40 cos 30°)t, y = 6 + (40 sin 30°)t - 10t2; t = 6

A. (-120, 172)
B. (240, 220)
C. (120, 66)
D. (120, -234)

Mathematics

Eleven batteries are hooked in series to provide a 54-V power source. Some of the batteries are 9 V and some are 1.5 V. How many of each type are used? 

A. 5 batteries of 1.5-V are used, 8 batteries of 9-V are used.   B. 6 batteries of 1.5-V are used, 5 batteries of 9-V are used.   C. 8 batteries of 9-V are used, 8 batteries of 1.5-V are used.   D. 4 batteries of 9-V are used, 7 batteries of 1.5-V are used.   E. 5 batteries of 9-V are used, 6 batteries of 1.5-V are used.  

Mathematics