Alex is saving up for a new car. He already has $14,500 saved up and the car costs $14,600. He decides that to make the last of the money he will deliver groceries for people in the neighborhood. He charges $1.5 per trip and then 5% of the price of the groceries. If he makes 40 trips and has saved up enough, how many dollars' worth of groceries did he deliver?

He needs to save up $100 because 14,600 - 14,500 =

<<14600-14500=100>>100 He earned $60 off trips because 40 x 1.5 = <<40*1.5=60>>60 He earned $40 off groceries because 100 - 60 = <<100-60=40>>40 He delivered $800 in groceries because 40 / .05 = <<40/.05=800>>800 #### 800 To upgrade her kitchen, Amanda is changing out the doorknobs/pulls. She’s replacing 18 cabinet knobs, which cost $2.50 each and 8 drawer pulls which cost $4.00. How much will the kitchen upgrade cost her? She’s replacing 18 cabinet knobs for $2.50 each for a total of 18*2.50 = $<<18*2.50=45.00>>45.00 She’s replacing 8 drawer pulls for $4.00 each for a total of 8*4 = $<<8*4=32.00>>32.00 The cabinet knobs will cost $45.00 and the pulls will cost $32.00 for a total of 45+32 = $<<45+32=77.00>>77.00 in upgrades #### 77 Zach is saving his money to buy a brand new bike that costs $100. His weekly allowance is $5. His parent will pay him an extra $10 to mow the lawn. His neighbor will pay him $7 per hour to babysit their son. He has already saved up $65. He'll receive his allowance on Friday and he's planning on babysitting for 2 hours this Saturday after he mows the lawn. How much more money does Zach need to earn before he can buy the bike? If he babysits for 2 hours at $7 per hour, he will earn 2*7 = $<<2*7=14>>14 This week he will earn $5 allowance, $10 mowing the lawn and $14 from babysitting for a total of 5+10+14 = $<<5+10+14=29>>29 If we add the $29 he will earn to his $65 savings, he will have a total of 29 + 65 = $<<29+65=94>>94 The bike costs $100 and he will have $94 leaving $100-$94 = $<<100-94=6>>6 more that he will need to earn #### 6 The news announced a $0.4 oil price rollback this Friday. Mr. Deane decided to only fill his gas tank with 10 liters of gas today and then another 25 liters on Friday. If the cost per liter of gas is $1.4 today, how much will Mr. Deane spend for his 35 liters of gas? Mr. Deane will spend $1.4/liter x 10 liters = $<<1.4*10=14>>14 for the 10 liters of gas today. The price of the gas per liter on Friday will be $1.4/liter - $0.4/liter = $<<1.4-0.4=1>>1/liter. So, he will spend $1/liter x 25 liters = $<<1*25=25>>25 for the 25 liters of gas on Friday. Thus, Mr. Deane will spend a total of $14 + $25 = $<<14+25=39>>39 for the 35 liters of gas. #### 39 Phill had some friends over for pizza. He opens the pizza box and discovers it hasn't been sliced. Phill cuts the pizza in half, and then cuts both halves in half, and then cuts each slice in half again. Phill then passes out 1 slice to 3 of his friends and 2 slices to 2 of his friends. How many slices of pizza are left for Phill? Phill starts with 1 pizza, cutting it in half. This means he now has 1*2=<<1*2=2>>2 slices of pizza. He cuts each of these 2 slices in half, meaning he now has 2*2= <<2*2=4>>4 slices of pizza. He then cuts these in half again, meaning he now has 4*2= <<4*2=8>>8 slices of pizza. Phill hands out 2 slices to 2 of his friends, meaning he gave out 2*2= <<2*2=4>>4 slices He hands out 1 slice to 3 others, so the total amount of slices handed out are 3+4=7 slices. Since Phill started with 8 slices, this means he has 8-7= <<8-7=1>>1 slice remaining. #### 1 Marky owns a computer accessory shop. For this month, half of their sales are wireless mice, one-fourth are optical mice, and the rest are trackball mice. If Marky's shop was able to sell a total of 80 mice, how many of them are trackball mice? There were 80/2 = <<80/2=40>>40 wireless mice sold. There were 80/4 = <<80/4=20>>20 optical mice sold. So, there were a total of 40 + 20 = <<40+20=60>>60 wireless and optical mice sold. Therefore, 80 - 60 = <<80-60=20>>20 trackball mice were sold this month. #### 20 Dana has 15 more pencils than Jayden, who has twice as much as Marcus. How many more pencils does Dana have than Marcus, if Jayden has 20 pencils? Dana has 15 more pencils than Jayden who has 20, so Dana has 20+15 = <<20+15=35>>35 pencils Jayden has 20 pencils which is twice as much as Marcus's so Marcus has 20/2 = <<20/2=10>>10 pencils Dana has 35-10 = <<35-10=25>>25 more pencils than Marcus #### 25 A 1165 cm long rope is cut into 154 pieces. 150 of the pieces are equally sized and the remaining pieces are 100mm each. Find the length of each of the equal pieces in millimeters. Each cm contains 10mm so 1165cm is 1165*10 = <<1165*10=11650>>11650mm 154-150 = <<154-150=4>>4 pieces of the rope are 100mm each in length The 4 pieces have a total length of 4*100 = <<4*100=400>>400mm There is a length of 11650-400 = <<11650-400=11250>>11250mm left 11250 mm into 150 equal pieces will give each piece as 11250/150 = <<11250/150=75>>75mm long #### 75 Each week, Paul has 2 hours of homework on weeknights and 5 hours for the entire weekend. This week Paul has practice 2 nights out of the week and can't do any homework those nights. How many hours of homework does he have to average for the other nights to get his week's homework done? Paul has 10 hours of homework from weekdays because 2 x 5 = <<10=10>>10 He has 15 total hours because 5 + 10 = <<5+10=15>>15 He has 5 days to do his homework because 7 - 2 = <<7-2=5>>5 He needs to do 3 hours a night because 15 / 5 = <<15/5=3>>3 #### 3 Tom plays an online trading card game. His deck has 19 rare cards, 11 uncommon, and 30 commons. The rare cards cost $1, the uncommon are $.50, and the commons are $.25 each. How much did his deck cost? The rares cost 19*1=$<<19=19>>19 The uncommon cards cost 11*.5=$<<11*.5=5.5>>5.5 The commons cost 30*.25=$<<30*.25=7.5>>7.5 So the total cost 19+5.5+7.5=$<<19+5.5+7.5=32>>32 #### 32