Hola alguien me podria ayudar con este ejercicio de mate pliss

What is the equation of the linear function represented by the table?

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.