Find all complex number solutions.x2 + 4 = 0
A. -2i
B. 2i
C. ±2i
D. ±2
Answer: C
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What percent of 250 is 15?
A. 6% B. 16.67% C. 15% D. 60%
Find the solution set in the real numbers.6(2w - 7) = 4(3w + 5)
A. 62 B. No solution C. All real numbers D. 0
The velocity of a falling object is a linear function of the time t it has been falling. If 
when 
and 
class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_e745074080f4402d8b1d6d8c5" /> when 
, express v as a function of t.
?
A. ?
B. ?
C. ?
D. 
E. ?
Solve the problem.Find the equation of a circle in standard form with center at the point (-3, 2) and tangent to the line y = 4.
A. (x + 3)2 + (y - 2)2 = 16 B. (x - 3)2 + (y + 2)2 = 4 C. (x - 3)2 + (y + 2)2 = 16 D. (x + 3)2 + (y - 2)2 = 4