Solve the system of linear equations using substitution. which expression would be eastier to substitute into the other equation, in order to solve this problem?

5500 dollars is placed in an account with an annual interest rate of 6.5%. to the nearest tenth of a year, how long will it take for the account value to reach 19700 dollars?

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b