![sarahsteelman](/avatars/28493.jpg)
sarahsteelman
20.07.2020 •
Mathematics
((Please help :D)) All the books at a store have the same price. The store is having a sale advertised with “buy one book, get the second half off.”
a) Write an expression with two terms to represent the cost of buying two books during the sale.
b) Write an equivalent expression with only one term.
Solved
Show answers
More tips
- F Food and Cooking How to Find Your Zip Code?...
- W Work and Career Can Skill Alone Make You a Professional?...
- C Computers and Internet How to Top Up Your Skype Account Without Losing Money?...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
- F Family and Home Protect Your Home or Apartment from Pesky Ants...
- O Other What is a Disk Emulsifier and How Does it Work?...
- F Family and Home What does a newborn need?...
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
Answers on questions: Mathematics
- M Mathematics Which symbol makes this sentence true: 4/9 O 7/15...
- M Mathematics X + 2x + 5 = x + 19 pls tell me what to do first....
- S Spanish Magbigay ng isang paraan ng pagpapakita ng pagmamahal sa diyos na kinakatawan ng pamilya...
- B Business You are the vice president of engineering for a large company. For the last several years the company has experienced lower sales and higher operating costs. Your budget...
- B Business Beanie works for the bean counter and gers paid $500 every friday for work done from onday to friday. assume that the company s financial year end (12/31) falls on a thursday....
- M Mathematics The table shows the number of hits Rishabh got for different numbers of games. Hits, y Game, x 4 2 8 16 8 20 10 Which equation can be used to find the number of hits Rishabh...
Ответ:
Part A
Let x be the cost of one book (before any kind of discount is applied). The first book is x dollars. The second book will be x/2 dollars since we get the second book half off. This is another way of saying a discount of 50%. We can write x/2 as (1/2)x or 0.5x; so there are multiple ways to answer. Probably the easiest to write out would be 0.5x
From here, we add the two costs x and 0.5x to get x+0.5x
We do not combine like terms, as that will happen with part B
x+0.5xPart B
We'll use the result of part A.
Think of the first x as 1x. It's saying we have one copy of x
So x+0.5x is the same as 1x+0.5x
Then to combine like terms, we add the numbers 1 and 0.5 to get 1.5
So 1x+0.5x = 1.5x
We can use the distributive property to see that
1x+0.5x = (1+0.5)x = 1.5x
Or you can think of it like saying "we have one x and half an x added, so overall we have one and a half x's"
However method you use, the answer from part A combines to 1.5x
If you want a fraction form, then it would be (3/2)x since 3/2 = 1.5; though I find decimals to be easier to work with.
1.5xОтвет:
21
Step-by-step explanation: