The perimeter of a rectangle is 34 units. Its width is 6,5 units. Write an equation to determine the length (L) of the rectangle.
Find the length of the rectangle.
units
Plz I need so much help

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Which of the following is true for the relation f(x)=2x^2+1

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?