Answer the question. POLLUTION 
Years since 1980Use the ordered pairs (2, 14.78), (6, 11.82), and (8, 13.58) to find a quadratic function that models the data. Round the values of a, b, and c to two decimal places.
A. y = -2.90x2 + 0.27x + 19.50
B. y = 2.90x2 - 0.27x + 19.50
C. y = 0.27x2 - 2.90x + 19.50
D. y = -2.90x2 + 0.27x + 20.50
Answer: C
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Multiply:
16 /98è 3 /-50è a. 48 /148è b. 19 /48è c. 19 /148è d. 48 /48è e. 48 /-32è
Which of the following would you most likely expect from a geometry student who is a naive empiricist?
a. Consulting an authority, like the textbook or the teacher, to determine the truth of the statement, "vertical angles are congruent." b. Refusing to believe the statement, "vertical angles are congruent." c. Being satisfied with the truth of the statement, "vertical angles are congruent" after examining several examples. d. Having an intellectual need for a deductive proof of the statement, "vertical angles are congruent."
Find an ordered pair that satisfies the given equation and uses the given value of x. y = -3x - 13 let x = -5
A. (-5, -5) B. (-5, 2) C. (-5, 4) D. (-5, -13)
Solve by the substitution method.x + y = 7x + y = -1
A. (0, 0) B. (0, 6) C. (7, -1) D. No solution