Martin and his family ate in a restaurant. the cost of the food was $84. including the tip, martin paid $100.80. how much was the tip?

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

What is the correlation coefficient for the data? don't forget to turn the diagnoisticon (in the catalog menu of the calculator). r = answer (round to the nearest thousandth)

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.