Can someone help me with this math homework please!

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

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?