Whitney bought 9 books about whales and 7 books about fish. She also bought 3 magazines. Each book cost $11 and each magazine cost $1. How much did Whitney spend in all?

The total number of books is 9 books + 7 books =

<<9+7=16>>16 books. The cost of the books is $11/book × 16 books = $<<11*16=176>>176. The cost of the magazines is $1/magazine × 3 magazines = $<<1*3=3>>3. Whitney spent $3 + $176 = $<<3+176=179>>179 in all. #### 179 Justin and Sabrina at Pine Grove Elementary have 50 pencils combined. Justin has 8 more than twice as many pencils as Sabrina. How many pencils does Sabrina have? Let's say Sabrina has p number of pencils. If Justin has 8 more than twice as many pencils as Sabrina, he has 2*p + 8 = 2p+8 Together, Justin and Sabrina has p +(2p+8)=50 This is equal to 3p=50-8 3p=42 The number of pencils that Sabrina has is p=42/3 Sabrina has p=<<14=14>>14 pencils #### 14 Annie brought 20 brownies to school. She gave half of them to the school administrator to put in the faculty lounge. Of the remaining brownies, she gave half to her best friend, Carl, and another two to her friend, Simon. How many brownies did she have left? She first gave away half of her 20 brownies, or 20/2=<<20/2=10>>10 brownies, to the faculty. The remaining brownies number 20-10=<<20-10=10>>10 brownies. She gave half of these remaining brownies, or 10/2=<<10/2=5>>5 brownies, to Carl. This reduced her number from 10 down to 10-5=<<10-5=5>>5 brownies. Finally, she gave away another 2, leaving her with 5-2=<<5-2=3>>3 brownies. #### 3 Josh has 100 feet of rope. He cuts the rope in half, and then takes one of the halves and cuts it in half again. He grabs one of the remaining pieces and cuts it into fifths. He's stuck holding one length of the rope he's most recently cut. How long is it? John starts with 100ft of rope that he cuts in half, meaning he has 100/2= <<100/2=50>>50-foot sections of rope. He then takes one of these sections and cuts it in half again, leaving him with two 50/2= <<50/2=25>>25-foot sections of rope. He then takes one of these sections and cuts it into fifths, leaving him with 25/5= <<25/5=5>>5 foot sections of rope, one of which he is now holding. #### 5 Tameka is selling boxes of crackers for her scout troop. On Friday, she sold 40 boxes. On Saturday, she sold 10 fewer than twice that number. And on Sunday, she sold half as many as Sunday. How many boxes did she sell over the three days? Saturday's total was 2*40-10=<<2*40-10=70>>70. Sunday's was 70/2=<<70/2=35>>35. The sum is 40+70+35=<<40+70+35=145>>145. #### 145 In 5 years, Frank will be three times as old as Ty is now. Ty is currently 4 years more than two times as old as Carla is now. Carla is currently 2 years older than Karen is now. If Karen is currently 2 years old, how old will Frank be in 5 years? Carla is currently 2 + 2 = <<2+2=4>>4 years old Ty is currently (2 * 4) + 4 = <<2*4+4=12>>12 years old In 5 years, Frank will be 12 * 3 = <<12*3=36>>36 years old #### 36 A Printing shop needs to ship 5000 brochures to an advertising company. Each box can only contain one-fifth of the brochures. How many boxes are needed to ship those brochures? 5000 x 1/5 = <<5000*1/5=1000>>1000 brochures can fit in one box. Thus, 5000/1000 = <<5000/1000=5>>5 boxes are needed #### 5 Emma's bank account has $100 in it. Each day of the week, she spends $8. At the end of the week, she goes to the bank and asks for as many $5 bills as her account can give her. She leaves the rest in the account. How many dollars remain in the account? She spend $56 because 7 x 8 = <<7*8=56>>56 She has $44 left in the bank because 100 - 56 = <<100-56=44>>44 She can get 8 five dollar bills because 44 / 5 = <<44/5=8.8>>8.8 This is equal to $40 because 8 x 5 = <<8*5=40>>40 She has $4 left in the account because 44 - 40 = <<44-40=4>>4 #### 4 Brian has twice as many tennis balls as Frodo, who has 8 more than Lily. If Lily has 3 tennis balls, how many does Brian have? Frodo has 8 tennis balls more than Lily (who has 3), so he has 8+3 = <<8+3=11>>11 tennis balls Brian has twice as many as Frodo, which makes 11*2 = <<11*2=22>>22 tennis balls. #### 22 There are 4 more Muscovy ducks than Cayugas, and 3 more than twice as many Cayugas as Khaki Campbells. If there are 90 ducks total, how many Muscovies are there? Let x represent the number of Khaki Campbell ducks. Cayugas:3+2x Muscovies:4+(3+2x)=7+2x Total: x+3+2x+7+2x=90 5x+10=90 5x=80 x=<<16=16>>16 Muscovy: 7+2(16)=39 #### 39