when using substitution to solve systems of equations that have no solution or infinitely many solutions, the variables are the same on both sids. How is the solution determined by the constants in the equatoins

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

If a is a nonzero real number then the reciprocal of a is

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0