Graph the linear equation using the slope and y-intercept y=1/9x+5

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

How do i simply this radical expression?

Yolanda wanted to buy a total of 6 pounds of mixed nuts and dried fruit for a party she paid 21.60 for mixed nuts and 11.90 for dried fruit did yolanda but enough mixed nuts and dried fruit for the party