What transformation is represented by the rule (x, y)→(−x, y) ? rotation of 180° about the origin reflection across the x-axis reflection across the y-axis rotation of 90° clockwise about the origin

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

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

20 only answer if 100% sure most high school-aged teens are very active. a. true b. false