On Monday, Sydney sends 5 texts each to Allison and Brittney. On Tuesday, she sends 15 texts to each of them. In total, how many texts did Sydney send to Allison and Brittney on both days? Think carefully first, then make a decision:
Sydney sends 5 * 2 = 10 texts on Monday. Sydney sends 15 * 2 = 30 texts on Tuesday. In total, Sydney sends 10 + 30 = 40 texts on both days. So, the answer is 40.