Simplify the expression. Write the result using positive exponents only.
A. y10
B. 
C. 
D. 
Answer: B
Mathematics
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Find all fixed points for the function by setting the function equal to x and solving the resulting equation for x.f(x) = x2 + 5x - 21
A. -7, -3 B. 3, 7 C. -3, 7 D. -7, 3
Mathematics
Round as indicated.$1,999.53 to the nearest dollar
A. $1,999.5 B. $2,000 C. $2 D. $1,000
Mathematics
Find all the cofactors of the matrix.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Translate to a system of two equations, then solve.If a plane can travel 230 miles per hour with the wind and only 170 miles per hour against the wind, find the speed of the wind and the speed of the plane in still air.
A. Plane: 30 mph, wind: 200 mph B. Plane: 200 mph, wind: 30 mph C. Plane: 200 mph, wind: 40 mph D. Plane: 300 mph, wind: 30 mph
Mathematics