The points (9,4) and (8,1) fall on a particular line. what is its equation in point - slope form

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

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil