Question: Dorothy sells glass frames at half the price that Jemma sells them. Jemma sells the glass frames at 5 dollars each, selling twice as many frames as Dorothy does. If Jemma sold 400 frames, how much did they make together in total from the sale of the glass frames?
Answer: If Jemma sold 400 glasses frames at $5 each, she made 400 * $5 = $2000. Jemma sold twice as many frames as Dorothy, meaning Dorothy sold 400 / 2 = 200 frames. If Dorothy sold her glasses frames at half the price that Jemma sold hers, then it means she sold her glasses frames at $5 / 2 = $2.5 per glasses frame. In total, Dorothy made $2.5 * 200 = $500 from the sale of her glasses frames. Together, they made $2000 + $500 = $2500 from the sale of the glasses frames. The answer is 2500.
[Question]John uses a 75-watt electric fan for 8 hours a day. How much kWh of electric energy does he consume per month (30 days) for using the electric fan?
[Answer]In a day, John uses 75x 8 = 600 watts. So in a month, he uses 600 x 30 = 18 000 watts. Since there are 1000 watts in 1 kilowatt, then John uses 18000 / 1000 = 18. The answer is 18.
Q: Stacy is a high school Calculus teacher. She assigns 45 problems for homework. There are twice as many multiple choice problems as free response, and 7 more free response than true/false. How many true/false questions are there?
A: Let x represent the number of true / false questions. Free response:x + 7. Multiple choice: 2(x + 7) = 2x + 14. Total:x + x + 7 + 2x + 14 = 45. 4x + 21 = 45. 4x = 24. x = 6 true / false questions. The answer is 6.
Question: Tom cannot afford a normal doctor, so he goes to a discount clinic that is 70% cheaper.  It takes two visits, though, instead of 1.  A normal doctor charges $200 for a visit.  How much money does he save?
Answer: Each of Tom's visits was 200 * .7 = $140 cheaper. So he paid $200 - $140 = $60 per visit. That means he paid $60 * 2 = $120. So he saved $200 - $120 = $80. The answer is 80.
[Question]A retail store wants to hire 50 new phone reps to assist with the increased call volume that they will experience over the holiday. Each phone rep will work 8 hours a day and will be paid $14.00 an hour. After 5 days, how much will the company pay all 50 new employees?
[Answer]There are 50 reps and they will work 8 hour days so that's 50 * 8 = 400 hours. They will work 5 days a week so that's 5 * 400 = 2,000 hours. Each worker will be paid $14.00 an hour and in 5 days they will have worked 2,000 hours so that's 14 * 2000 = $28,000. The answer is 28000.
[Question]John's car needs a new engine. The labor costs $75 an hour for 16 hours. The part itself cost $1200. How much did the repairs cost in total?
[Answer]
The labor cost 16 * $75 = $1200. So the total cost was $1200 + $1200 = $2400. The answer is 2400.