Write a polynomial that represents the perimeter of a triangle with side lengths, 4x+5, 10x-5, and 2x+9. (Make sure you have NO spaces in your responses!) (Use ^for your exponent) ( You do not need to use ( ) in your responses!)

What is sin 7x/4 ? i need on this urgent trig

What is the range? can’t seem to find it out

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.71 with a standard deviation of $0.10. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.41 and $4.01? round your answer to one decimal place.