Use the distributive property to simplify.4(y + 7) - 3
A. 4y + 25
B. 4y + 31
C. 4y + 28 - 3
D. 4y + 4
Answer: A
Mathematics
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Sketch a typical level surface for the function.f(x, y, z) = e(x2 + y2 + z2)
A. 
B. 
C. 
D. 
Mathematics
Find the limit, if it exists.
A. 1 B. -1 C. 0 D. Does not exist
Mathematics
Find the vertex, focus, and directrix of the parabola. Graph the equation.y2 = 8x
A. vertex: (0, 0)
focus: (0, 2)
directrix: y = -2
B. vertex: (0, 0)
focus: (2, 0)
directrix: x = -2
C. vertex: (0, 0)
focus: (0, 2)
directrix: y = -2
D. vertex: (0, 0)
focus: (-2, 0)
directrix: x = 2
Mathematics
Decide whether the set is countably infinite. ? Set of whole numbers. ?
A. no B. yes
Mathematics