Some friends go to the store to buy school supplies. noel spends $4.89. holly spends 3 times as much as noel. kris spends $12.73 more than holly. how much does kris spend? walk me through every single step i really need

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

In the diagram of circle a what is m