Solve the following system of equations by graphing. Write the solution as an ordered pair or state that the system has no solution or infinitely many solutions.x + y = 2x - y = 4
A. (-1, 3)
B. no solution
C. (3, -1)
D. (3, 1)
Answer: C
Mathematics
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Solve.A population is growing at a rate proportional to its size. If the population is 139,000 initially and 191,000 after 9 years, how long will it take the population to double?
A. 18.3 years B. 19.6 years C. 21.0 years D. 21.4 years
Mathematics
Find the inverse of the given function.y = 4 log 10 x
A. y = 
B. y = 4 log x 10
C. y = 10x/4
D. y = 104x
Mathematics
Use the given information to find the equation of the circle.Center: (-8, 0); radius: 11
A. x2 + (y + 8)2 = 11 B. (x - 8)2 + y2 = 121 C. x2 + (y - 8)2 = 11 D. (x + 8)2 + y2 = 121
Mathematics
Simplify the rational expression. If the rational expression cannot be simplified, so state.
A. 
B. - 
C. 
D. 
Mathematics