-18-6k=6(1+3k)...what is the value of k

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt