Solve the equation by the quadratic formula.7x2 - 21 = 0
A. 
B. ± 
C. ±
D. ±
Answer: C
Mathematics
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Find the rational number halfway between the two numbers in each pair. - 3 and -5
A. 4 B. 8 C. - 8 D. - 4
Mathematics
Subtract.123 - 124
A. 1 B. -1 C. 247 D. -247
Mathematics
Sketch the graph of the quadratic function. Identify the vertex and axis of symmetry.y = 3x2 
A. vertex: (0, 3)
axis of symmetry: x = 0
B. vertex: (0, 0)
axis of symmetry: x = 0
C. vertex: (0, 0)
axis of symmetry: x = 0
D. vertex: (0, 0)
axis of symmetry: x = 0
Mathematics
Solve the logarithmic equation.log x = -6
A. -60 B. 0.000001 C. -6 D. -0.6
Mathematics