Solve the system by elimination.-7x + 9y = 42-4x + 6y = 24
A. {(-7, 1)}
B. {(-6, 0)}
C. {(x, y)|-4x + 6y = 24}
D. ?
Answer: B
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The difference D between the temperature of an oven and the temperature of an object baking in the oven satisfies an equation of change of the form 
.
Answer the following statement true (T) or false (F)
Use a graphing calculator to help determine whether or not the given functions are inverses of each other.f(x) = 0.25x2 - 8.57, x ? 0; g(x) = -
A. Yes B. No
Graph the system of inequalities.
? 5y ? 3y ? x2 - 3
A. 
B. 
C. 
D. 
The percent of mothers who work outside the home and have children younger than age 6 yr is approximated by the function 
where t is measured in years, with 
corresponding to the beginning of 1980.
?
Compute 
. Round your answer to six decimal places.
?
A. 
per year in the second power
B. 
per year in the second power
C. 
per year in the second power
D. 
per year in the second power
E. 
per year in the second power