Sum of 23 and y please help

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet