James buys steaks for buy one get one free. The price is $15 per pound and he buys 20 pounds. How much did he pay for the steaks?

How many pounds of steaks does James buy? ** He pays for 20/2=

<<20/2=10>>10 pounds of steaks How much did the steaks cost? ** That cost 10*15=$<<10*15=150>>150 #### 150 James drives 30 mph for half an hour and then twice as long for twice the speed. How far did he drive in total? How far did James drive in the first half hour? ** His first drive was 30*.5=<<30*.5=15>>15 miles How long was the second half hour? ** The next leg was .5*2=<<.5*2=1>>1 hour How fast was James driving? ** The speed of the trip was 30*2=<<30*2=60>>60 mph How far did James drive in the second half hour? ** So he drove 60*1=<<60=60>>60 miles How far did James drive in total? ** So in total he drove 60+15=<<60+15=75>>75 miles #### 75 The electricity price in Coco's town is $0.10 per kW. Coco's new oven has a consumption rate of 2.4 kWh (kilowatt-hours). How much will Coco pay for using his oven only if he used it for a total of 25 hours last month? How many kW did Coco use last month? ** If Coco used his oven 25 hours last month and its energy consumption is 2.4 kW per hour, then we consumed a total of 25*2.4= <<25*2.4=60>>60 kW on his oven last month How much would it cost to use the oven for 60 kW? ** If the price of electricity is $0.10 per kW, then 60 kW would cost = $0.10*60 = $<<0.10*60=6>>6 #### 6 A pie shop charges $3 per slice of custard pie. They cut each whole pie into 10 slices. If they make 6 whole custard pies, how much money will the pie shop earn? How many slices of custard pie does the pie shop have? ** The pie shop has 6 x 10 = <<6*10=60>>60 slices of custard pie. How much money will the pie shop earn? ** Therefore, the pie shop will earn $3 x 60 = $<<3*60=180>>180 for the 60 slices of custard pie. #### 180 A fruit and vegetable merchant installed 15 kg of carrots, 13 kg of zucchini and 8 kg of broccoli. He sold only half of them. What mass of vegetables did he sell? How many kg of vegetables did the merchant install? ** You first need to know the total weight of the vegetables, so you add each quantity: 15 + 13 + 8 = <<15+13+8=36>>36 kg How many kg of vegetables did the merchant sell? ** Then you have to find half of 36: 36/2 = <<36/2=18>>18 kg. What mass of vegetables did he sell? ** So, he sold 18 kg of vegetables. #### 18 Elysse can carry 3 bags of groceries into her home with each trip from the car. Her brother can carry the same amount. How many trips will it take them to carry 30 bags of groceries? How many bags of groceries can Elysse and her brother carry? ** Elysse and her brother can carry 3 x 2 = <<3*2=6>>6 bags of groceries with each trip from the car. How many trips will it take them to carry 30 bags of groceries? ** Therefore, it will take both of them 30/6 = <<30/6=5>>5 trips. #### 5 Jennifer has ten pears, 20 oranges, and twice as many apples as pears. If she gives her sister two of each fruit, how many fruits does she have left? How many apples does Jennifer have? ** Jennifer has 2*10 = <<2*10=20>>20 apples. How many fruits does Jennifer have? ** She has a total of 10+20+20 = <<10+20+20=50>>50 fruits. How many fruits does Jennifer give her sister? ** She gives her sister 2 pears+2 oranges+2 apples = <<2+2+2=6>>6 fruits. How many fruits does Jennifer have left? ** After giving her sister 2 of each fruit, she has 50-6 = <<50-6=44>>44 fruits left. #### 44 Clara brings a package of 100 stickers to school. She gives 10 stickers to a boy she likes. She gives half of the stickers which she has left to her best friends. How many stickers does Clara have left? How many stickers does Clara give to the boy she likes? ** She gives the boy she likes 10 stickers. How many stickers does Clara have left after giving the boy his stickers? ** After giving the boy his stickers, she has 100 – 10 = <<100-10=90>>90 stickers left. How many stickers does Clara give to her best friends? ** She gives her best friends 90 / 2 = <<90/2=45>>45 stickers How many stickers does Clara have left? ** This leaves Clara with 90 – 45 stickers = <<90-45=45>>45 stickers. #### 45 Annie is trying to figure out whether it's safe to drive her truck. For every 3 degrees the temperature drops below 32 degrees, Annie's chances of skidding on ice increase 5%. If she goes into a skid, she has a 40% of regaining control. Otherwise, she'll have a serious accident. If the temperature is 8 degrees, what is the percentage chance of Annie getting into a serious accident if she drives? How many degrees below 32 is the temperature? ** First find how many degrees below 32 the temperature is: 32 degrees - 8 degrees = <<32-8=24>>24 degrees How many 5% increases are there? ** Then divide that amount by the number of degrees per 5% increase in skid risk to find how many 5% increases there are: 24 degrees / 3 degrees/5% increase = <<24/3=8>>8 5% increases How much does the temperature increase the risk of skidding? ** Multiply the number of increases by 5% to find the total increase in skid risk: 8 * 5% = 40% What is the chance that Annie has a serious accident if she goes into a skid? ** Now find the chance that Annie has a serious accident if she goes into a skid by subtracting the chance she regains control from 100%: 100% - 40% = 60% What is the total risk of a serious accident? ** Finally, multiply the chance of going into a skid by the chance of having a serious accident after a skid to find the total risk of a serious accident: 60% * 40% = 24% #### 24 Max was doing homework in three different subjects. It took him 20 minutes to finish tasks from biology and two times more time to finish history. Geography took him the most time, three times more than history. How much time did Max spend on doing his homework? How long did it take Max to finish history? ** Max finished history in 20 * 2 = <<20*2=40>>40 minutes. How long did it take Max to finish geography? ** Finishing geography took the most time, which is 40 * 3 = <<40*3=120>>120 minutes. How much time did Max spend on doing his homework? ** In total, for all three subjects, Max needed 20 + 40 + 120 = <<20+40+120=180>>180 minutes. #### 180