Find all real solutions of the equation  figure 1.png)
(a) x = 0
(b) x = 0, x = 4, x = -4
(c) x = 0, x = 16
(d) x = 0, x = 16, x = -16
(e) none of these
(b) x = 0, x = 4, x = -4
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Graph the system of inequalities.y ? 2x - 1x + y ? 4
A. 
B. 
C. 
D. 
Use a graphing calculator to plot the data and find the quadratic function of best fit.The number of housing starts in one beachside community remained fairly level until 1992 and then began to increase. The following data shows the number of housing starts since 1992 (x = 1). Use a graphing calculator to plot a scatter diagram. What is the quadratic function of best fit?
A. H(x) = -2.679x2 - 26.607x + 168.571 B. H(x) = -2.679x2 + 26.607x - 168.571 C. H(x) = 2.679x2 + 26.607x + 168.571 D. H(x) = -2.679x2 + 26.607x + 168.571
Find an equation for the indicated ellipse.Vertices: (3, -3) and (-5, -3); endpoints of minor axis: (-1, -1) and (-1, -5)
A. 
+ 
= 1
B. 
+ 
= 0
C. 
+ 
= 1
D. 
+ 
= 1
Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 750e-0.033t, where t is the time in years? Round to the nearest hundredth.
A. 221.61 yr B. 200.61 yr C. 24.75 yr D. 21.00 yr