Ivory and Brayan are doing school projects with a tight deadline and have to stay up late to complete everything. They prepare coffee to help them stay focused. If Brayan drinks twice as much coffee as Ivory, and Brayan drinks 4 cups of coffee in an hour, calculate the total number of cups of coffee they drink together in 5 hours.

How many cups of coffee does Ivory drink in an hour? ** If Brayan drinks 4 cups of coffee in an hour, twice what Ivory drinks, then Ivory drinks 4/2 =

<<4/2=2>>2 cups of coffee in an hour. How many cups of coffee do Ivory and Brayan drink together in an hour? ** Together, they drink 4+2 = <<4+2=6>>6 cups of coffee in an hour. How many cups of coffee do Ivory and Brayan drink together in 5 hours? ** After 5 hours, they will drink 5*6 = <<5*6=30>>30 cups of coffee together. #### 30 Lexi wants to run a total of three and one-fourth miles. One lap on a particular outdoor track measures a quarter of a mile around. How many complete laps must she run? How many one-fourth miles are in 3 miles? ** There are 3/ 1/4 = 12 one-fourth miles in 3 miles. How many complete laps must she run? ** So, Lexi will have to run 12 (from 3 miles) + 1 (from 1/4 mile) = <<12+1=13>>13 complete laps. #### 13 Olaf is playing a game with his dad. He scored three times more points than his dad, who scored 7 points. How many points did they score in total? How many points did Olaf score? ** Olaf scored three times more points than his dad, which means he scored 7 * 3 = <<3*7=21>>21 points. How many points did Olaf and his dad score in total? ** So in total, Olaf and his dad scored 21 + 7 = <<21+7=28>>28 points. #### 28 Crystal wanted to sell everything left in her pastry class before closing for the night. She reduced her $3.00 cupcakes and her $2.00 cookies by half. How much money did she make if she sold the last 16 cupcakes and 8 cookies? How much did the cupcakes cost? ** She reduced the price of the $3.00 cupcakes by half so they are now 3/2 = $<<3/2=1.50>>1.50 How much did the cookies cost? ** She reduced the price of the $2.00 cookies by half so they are now 2/2= $<<2/2=1.00>>1.00 How much did she make from selling the cupcakes? ** She sold 16 cupcakes at $1.50 each so she made = 16*1.50 = $<<16*1.50=24.00>>24.00 How much did she make from selling the cookies? ** She sold 8 cookies at $1.00 each so she made 8*1 = $<<8*1=8.00>>8.00 How much money did she make? ** She made $24.00 from the cupcakes and $8.00 from the cookies for a total of 24+8 = $<<24+8=32.00>>32.00 #### 32 When Patrick, Manu, and Amy participate in a race they realize that Patrick finishes the race in 60 seconds. Manu took 12 more seconds to finish the race. If Amy is twice as fast as Manu, how long did it take her to finish the race? How long did it take Manu to finish the race? ** The time it took Manu to complete the race is 60 + 12 = <<60+12=72>>72 seconds How long did it take Amy to finish the race? ** If Amy is twice as fast as Manu, then she takes half the time Manu did to finish the race, so Amy took 1/2 * 72 = 36 seconds. #### 36 Susie's pet lizard Moe takes 10 seconds to eat 40 pieces of cuttlebone each day. How long would it take Moe to eat 800 pieces? How many cuttlebones does Moe eat in one second? ** If it takes Moe 10 seconds to eat 40 cuttlebones, then in one second she eats 40 cuttlebones / 10 seconds = <<40/10=4>>4 cuttlebones/second How many seconds will it take Moe to eat 800 pieces? ** Since the cat eats 4 pieces of cuttlebone in 1 second, 800 pieces will be 800 cuttlebones / 4 cuttlebones/second = <<800/4=200>>200 seconds. #### 200 Jude bought three chairs for his house, all at the same price. He also bought a table that costs $50 and two sets of plates at $20 for each set. After giving the cashier $130, Jude got a $4 change. How much did each of the chairs cost? How much did the two sets of plates cost? ** The two sets of plates amount to $20 x 2 = $<<20*2=40>>40. How much did the table and the two sets of plates cost? ** So the table and the two sets of plates amount to $50 + $40 = $<<50+40=90>>90 in all. How much did the chairs, tables, and plates cost? ** Since Jude received a $4 change, then he paid a total of $130 - $4 = $<<130-4=126>>126 for the chairs, tables, and plates. How much did the three chairs cost? ** Thus, the three chairs cost $126 - $90 = $<<126-90=36>>36. How much did each chair cost? ** Therefore, each chair cost $36/3 = $<<36/3=12>>12. #### 12 Rubble has $15 in his pocket and he needs to buy 2 notebooks and 2 pens. Each notebook cost $4.00 meanwhile each pen cost $1.50. How much money will be left from Rubble after the purchase? How much do the notebooks cost? ** The total cost of two notebooks is $4.00 x 2 = $<<4*2=8.00>>8.00. How much do the pens cost? ** The total cost of two pen $1.50 x 2 = $<<1.5*2=3.00>>3.00. How much money did Rubble spend? ** So, the total amount Rubble spent for all the stuff was $8.00 + $3.00 = $<<8+3=11.00>>11.00. How much money was left after the purchase? ** Therefore, Rubble was left off with $15.00 - $11.00 = $<<15-11=4.00>>4.00. #### 4 John is budgeting for his marriage. The venue cost $10,000. It cost $500 for each guest, and John wants 50 guests while his wife wants 60% more than that. How much would the wedding cost if John's wife gets her way? How many more guests does the bride want than the husband? ** The bride wanted 50*.6=<<50*.6=30>>30 more guests than the husband How many guests does the bride want? ** So the bride wanted 50+30=<<50+30=80>>80 guests How much do the guests cost? ** So the guests cost 80*$500=$<<80*500=40000>>40000 How much did the wedding cost? ** So the total cost was $40000+$10,000=$<<40000+10000=50000>>50000 #### 50000 Tom decided to go on a trip. During this trip, he needs to cross a lake, which in one direction takes 4 hours. During this time, Tom needs an assistant to help him with the crossing. Hiring an assistant costs $10 per hour. How much would Tom have to pay for help with crossing the lake back and forth? How many hours would it take to cross the lake? ** Crossing the lake two times (back and forth) would take 4 * 2 = <<4*2=8>>8 hours. How much would Tom have to pay for help with crossing the lake back and forth? ** So Tom would need to pay an assistant 8 * 10 = $<<8*10=80>>80. #### 80