Expand the expression using the binomial theorem and pascal's triangle: (3x-1)^3

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

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

Melanie spent 4 hours babysiting she charges 16 dollers upfront and the an additional charge per hour the total amount she earned can be represented by the expression $4x+ $16 what expression repersents the amount she earns each hour?