Before school, janine spends 1/10 hour making the bed, 1/5 hour getting dressed, and 1/2 hour eating breakfast. what fraction of an hour does she spend doing these activities?

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)