Can someone me with this problem as soon as possible it’s solve for x

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose

Tim has obtained a 3/27 balloon mortgage. after the initial period, he decided to refinance the balloon payment with a new 30-year mortgage. how many years will he be paying for his mortgage in total?