Solve the problem using matrices.The table below shows the number of birds for three selected years after an endangered species protection program was started.
Use the quadratic function y = ax2 + bx + c to model the data. Solve the system of linear equations involving a, b, and c using matrices. Find the equation that models the data.
A. y = 10x2 - 33x + 26
B. y = 7x2 - 11x + 33
C. y = 6x2 + 22x + 25
D. y = 5x2 + 11x + 30
Answer: D
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Find the domain and range.f(x) = 2x - 13
A. Domain: All real numbers; range: All real numbers B. Domain: All real numbers; range: y ? -13 C. Domain: All real numbers; range: y ? 0 D. Domain: x ? 0; range: All real numbers
Solve the equation ?x²+5x = x+5
What will be an ideal response?
Find an equation of a parabola that satisfies the given conditions.Focus (6, 7), directrix y = -3
A. (x - 6)2 = 20(y - 7) B. (x - 6)2 = 20(y - 2) C. (y - 7)2 = 20(x - 6) D. (x - 7)2 = 20(y - 2)
Solve the system of equations using substitution.
A. x = 
, y = 6; x = - 
, y = 
or 
), 
B. x = - 
, y = 2; x = 1, y = 5
or 
, (1, 5)
C. x = 
, y = 
; x = - 
, y = 0
or 
, 
D. x = 
, y = 
; x = 1, y = 5
or 
, (1, 5)