Tell whether the given number is a solution of the equation.
?
; 
?
A. unqualified solution
B. removed solution
C. solution
D. not a solution
E. none of these
Answer: D
Mathematics
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Solve the equation using the quadratic formula.3x2 = -8x - 3
A. 
B. 
C. 
D. 
Mathematics
Solve the proportion.
= 
A. 1.5 B. 12 C. 6 D. 130.7
Mathematics
Graph the quadratic function using its vertex, axis of symmetry, and intercepts.f(x) = -x2 - 4x - 3
A. vertex (2, 1)
intercepts (1, 0), (3, 0), (0, -3)
B. vertex (-2, 1)
intercepts (-1, 0), (- 3, 0), (0, -3)
C. vertex (2, -1)
intercepts (1, 0), (3, 0), (0, 3)
D. vertex (-2, -1)
intercepts (-1, 0), (- 3, 0), (0, 3)
Mathematics
Use a calculator to find the value of y in degrees rounded to two decimal places.y = cos-1 (-0.7486)
A. 36.82° B. 138.47° C. 48.47° D. -48.47°
Mathematics