Find the inverse of the matrix A, if it exists.A = 
A. A-1 = 
B. A-1 = 
C. A-1 = 
D. A-1 does not exist.
Answer: D
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he temperature-humidity index I (or humidex, for short) is the perceived air temperature when the actual temperature is T and the relative humidity is h, so we can write I = f(T, h). The following table of values of I is an excerpt from a table compiled by the National Oceanic and Atmospheric Administration. For what value of T is f(T, 50) = 107?
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Add.12 + 67
A. 88 B. 69 C. 79 D. 77
Find the values of a, b, and c for which the quadratic equation ax2 + bx + c = 0 has the given numbers as solutions. Then use those values to write a quadratic equation.8, 5
A. x2 + 40x + 13 = 0 B. x2 + 40x - 13 = 0 C. x2 - 13x + 40 = 0 D. x2 + 13x + 40 = 0
Solve the following system by any appropriate method. If there is no real number solution, so state.y2 + 3x2 = 37y2 - x2 = 1
A. (3, -
), (3, 
)
B. (4, 
), (4, -
), (-4, 
), (-4, -
)
C. (3, 
), (-3, 
)
D. (3, 
), (3, -
), (-3, 
), (-3, -
)