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A kilogram of rice costs $2.05.what is the cost of 30kg of the rice? We multiply the price for 1 kilogram by the 30 kilograms total: $2.05 * 30 = $61.50

20% of a number is x. What is 100% of the number? Assume x>0. Let the number be n. We're given: 0.2n = x <-- Since 20% = 0.2 To find n, we multiply each side of the equation by 5: 5(0.2)n = 5x n = 5x

Ty uses his blocks to build towers of 10 blocks each. There are 14 towers and five blocks left over. Total Blocks = Tower Blocks + Left Over Blocks First, calculate the number of tower blocks: Tower Blocks = Towers * Blocks per Tower Tower Blocks = 14 * 10 Tower Blocks = 140 We have 5 left...

A catering service offers 3 appetizers, 6 main courses, and 4 desserts. A customer is to select 2 appetizers, 3 main courses, and 3 desserts for a banquet. In how many ways can this be done? We use the combinations formula, and since each event is independent of the others, we multiply: 2...

Jake Callahan stars in the new TV series Stone Simons: Kid Astronaut. The day after the first episode airs, Jake receives a bunch of fan mail. He splits all the letters into 3 equal stacks to open with his mom and his sister. Each stack contains 21 letters. Which equation can you use to find the...

1 apartment equals 10 window each window cost $79.30 there are 30 apartments what is the total for replacing all the windows. 30 apartments * 10 windows per apartment * $79.30 per window = $23,790

Adam has 20 sweets he eats a quarter of them how many does he have left? A quarter means 1/4. There's 2 ways you can approach this problem. Approach #1: Adam eats a quarter, or 1/4 of the sweets. So he eats: 20 * 1/4 = 5 Remaining sweets = Total Apples - Eaten Apples Remaining sweets = 0 - 5...

The sum of a and b divided by their product The sum of a and b means we add b to a: a + b The product of a and b means we multiply a by b: ab To get our final algebraic expression, we divide the sum (a + b) by the product ab: (a + b)/ab

A large storage container is filled with 44.9 quarts of water. One quart of water is equivalent to 32 fluid ounces. How many fluid ounces of water are stored in the container? Round your answer to the nearest whole number. 44.9 quarts * 32 fluid ounce / quart = 1,436.8 if we found to the...

Jenny makes 9 dollars for each hour of work. Write an equation to represent her total pay p after working h hours. Since Jenny makes 9 dollars for each hour of work, then her total pay (p) is her hourly rate times the number of hours worked: p = 9h

Each pair of skates has 8 wheels.if the skating rink has 87 pairs of skates. How many wheels are at the rink? Total Wheels = Pairs of Skates * 8 wheels per pair Total Wheels = 87 * 8 Total Wheels = 609

Josh earns $25 per week for cleaning his room. He cleaned his room for 7 weeks. How much money did Josh earn? Total Earnings = Room cleaning Fee Per Week * Number of Weeks Total Earnings = $25 * 7 Total Earnings = $175

A catering service offers 4 appetizers, 12 main courses, and 9 desserts. A customer is to select 3 appetizers, 10 main courses, and 5 desserts for a banquet. In how many ways can this be done? We use combinations, so we have: 4C3 appetizers = 4 12C10 main courses = 66 9C5 desserts = 126 We...

c increased by a factor of 20 This means we multiply c by 20: 20c

Serial numbers for a product are to be using 3 letters followed by 4 digits. The letters are to be taken from the first 8 letters of the alphabet with no repeats. The digits are taken from numbers 0-9 with no repeats. How many serial numbers can be generated The serial number is organized with...

180 students 1/6 are Hispanic, how many are Hispanic? Number of Hispanics = 180 * 1/6 = 30

Ronnie, liza, vivien, and vina are classmates. They send each other a Valentines card. Find the number of Valentines cards they send altogether We've got 4 classmates. Which means each person sends 3 Valentine's cards (to everybody else in the class but themselves): 3 * 3 * 3 * 3 or 4 * 3 = 12...

The doctor told Anna that tomorrow she will have to check her blood pressure every 15 minutes from 10:00 AM to 4:00 PM. How many times does she have to take her blood pressure? 10:00 A.M. to 4:00 P.M. is 6 hours. Each hour is 60 minutes 60 minutes divided by 15 minutes equals 4 blood pressure...

A car wash cleans 75 vehicles every 3 hours. How many hours will it take to clean 225 cars? 225/75 = 3 So we have 3 x 3 hour blocks = 9 hours

I play volleyball 3 days a week for 2 hours how many hours do I play per month? 2 hours per day * 3 days per week * 4 weeks in a month = 24 hours per month