:write 3x^2(-5x^2 - 2x^2) in standard form

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earn $75 in interest.how much interest will she earn during the following year?

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?