Solve by the method of your choice.x3 + y = 05x2 - y = 0
A. {(0, 0), (-5, 125)}
B. {(-1, 1), (-5, 125)}
C. {(0, 0), (-5, 25)}
D. {(0, 0), (5, -125)}
Answer: A
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Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 93% of the isotope left?
A. 363 years B. 253 years C. 350 years D. 700 years
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 6 
- 8
+ 9 
+ 2
A. 9
B. 15 
- 6
C. 15 
- 6
D. 15 
- 6
Solve for the specified variable.I = 
for R
A. R = 
B. R = 
C. R = kEI
D. R = kE - I
Write the system
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?
as a matrix equation AX = B, where A is the coefficient matrix of the system, X is a column matrix of variables, and B is the column matrix of constants. Multiply each side of the equation on the left by the matrix inverse of A to obtain an equivalent system of equations and solve it.
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Please enter your answer as an ordered pair in the form (x, y).
What will be an ideal response?