Question: Tom and Devin have been teaching for a total of 70 years. Devin has been teaching for 5 less than half the number of years that Tom has. How many years has Tom been teaching?
Answer with step-by-step thinking: Let x be the number of years Tom has been teaching. Devin has been teaching for (1 / 2)x - 5 years. 70 = x + ((1 / 2)x - 5). 70 = (3 / 2)x - 5. 75 = (3 / 2)x. x = 50. Tom has been teaching for 50 years.
So the answer is 50.

Question: Biff and Kenneth decide to compete in a 500-yard rowboat race. If Biff rows at a speed of 50 yards per minute and Kenneth rows at a speed of 51 yards per minute, how many yards past the finish line will Kenneth be when Biff crosses the finish line?
Answer with step-by-step thinking: Traveling at 50 yards per minute, Biff can travel 500 yards in 500 / 50 = 10 minutes. In 10 minutes, traveling at 51 yards per minute, Kenneth can travel 10 * 51 = 510 yards. Thus, Kenneth will be 510 - 500 = 10 yards past the finish line when Biff crosses the finish line.
So the answer is 10.

Question: To support the school outreach program, Einstein wants to raise $500 by selling snacks. One box of pizza sells for $12, a pack of potato fries sells for $0.30, and a can of soda at $2. Einstein sold 15 boxes of pizzas, 40 packs of potato fries, and 25 cans of soda. How much more money does Einstein need to raise to reach his goal?
Answer with step-by-step thinking:
Einstein collected 15 x $12 = $180 for selling pizzas. He collected 40 x $0.30 = $12 for the 40 packs of potato fries. He collected 25 x $2 = $50 for the 25 cans of soda. Thus, the total amount section Einstein collected was $180 + $12 + $50 = $242. Therefore, Einstein needs $500 - $242 = $258 more to reach the goal.
So the answer is 258.