Use the indicated row operation to change the matrix.Replace R2 by R1 + (-1)R2.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find the center and radius of the sphere.(x + 2)2 + (y + 9)2 + (z + 8)2 = 
A. C(2, 9, 8), a = 
B. C(2, 9, 8), a = 
C. C(-2, -9, -8), a = 
D. C(-2, -9, -8), a = 
Mathematics
Classify the statement as true or false.Calculus ? The set of all mathematics topics
A. True B. False
Mathematics
Solve the problem.Find the acute angle ? (in degrees) that satisfies the equation cos ? = 
.
A. 330° B. 315° C. 45° D. 30°
Mathematics
Solve with calculator.The formula 
models the duration of a storm, D, in hours, in terms of the diameter of the storm, x, in miles. Use a calculator to determine the duration of a storm with a diameter of 7 miles. Round to the nearest hundredth.
A. 0.19 hours B. 1.3 hours C. 0.34 hours D. 18.52 hours
Mathematics