Ana can finish a certain job in 10 hours. together, ana and nina can finish the same job in 3 hours. how many hours can nina finish the job alone?

If kn = 9 cm, mn = 21 cm, rs = 42 cm, and ps = 18 cm, what is the scale factor of figure klmn to figure pqrs?

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52

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.