Find the center and the radius of the circle.x2 + y2 = 81
A. (0, 9), r = 81
B. (0, 0), r = 9
C. (0, 0), r = 81
D. (9, 9), r = 81
Answer: B
Mathematics
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Subtract.84 - 12
A. 82 B. 67 C. 92 D. 72
Mathematics
Provide an appropriate response.The time it takes a boat to travel a given distance downstream (with the current) can be calculated by dividing the distance by the sum of the speed of the boat and the speed of the current. Write an equation which calculates the time t it takes a boat moving at a speed r against a current c to travel a distance d. Solve your equation for r.
What will be an ideal response?
Mathematics
Simplify by combining like terms.24x - 8y + 10 - 2x - 4 - 6y
A. 22x - 14y + 6 B. -22x - 2y + 6 C. 22x - 2y + 6 D. -22x - 14y + 6
Mathematics
Graph the equation.7x2 + 2xy + 7y2 = 24
A. 
B. 
C. 
D. 
Mathematics