Solve the following problem involving the graph of a quadratic equation.On a particular day, the amount of pollution A in the air outside a home located near a factory can be modeled by the expression 
, where t is the number of hours after 12 P.M. Graph the equation that models the amount of pollution. At what time of day was the pollution highest?What was the highest amount of pollution in the air during the day?
What will be an ideal response?
Pollution was highest at 4 P.M. The highest amount of pollution was 256 ppm.
Mathematics
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Solve the system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
A. x = 27, y = 9, z = 6; (27, 9, 6)
B. x = -9, y = -9, z = 3; (-9, -9, 3)
C. x = 
y - 
z - 
, y is any real number, z is any real number
or 
D. inconsistent
Mathematics
Factor completely.-10x2y2 + 47xy - 9
A. (2xy + 9)(-5xy - 1) B. (2xy - 9)(-5xy - 1) C. (2xy + 9)(5xy + 1) D. (2xy - 9)(-5xy + 1)
Mathematics
Use long division to divide.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Give an appropriate answer.Let
f(x) = 225. Find
.
A. 15 B. 225 C. 6 D. 3.8730
Mathematics