brooke0713
12.06.2021 •
Mathematics
Susan is buying dress costing $80 that is on sale for 20% off. The sales tax is 5.5%. How much will she pay for the dress?
Solved
Show answers
More tips
- H Health and Medicine Everything You Wanted to Know About Male Circumcision: Its Goals and Effects...
- L Leisure and Entertainment Couchsurfing: A New Way to Travel...
- G Goods and services Which TV is better - LCD or Plasma?...
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- C Computers and Internet Where did torrents.ru move to?...
- B Business and Finance Understanding Cash Flow: What It Is and How It Works...
- C Computers and Internet What Are Peers and Seeds in Torrenting?...
- H Health and Medicine 10 Simple Techniques on How to Boost Your Mood...
- G Goods and services How to Choose the Right High Chair for Your Baby?...
Answers on questions: Mathematics
- M Mathematics Consider the slopes and y-intercepts of each system of equation. Choose true or false for each statement....
- B Biology Outline the process of how a signal is transmitted between two neurons (synaptic transmission)...
- H History How have archaeologists and historians learned about the daily lives of ancient egyptians? a. they excavated temples and tombs whose walls were covered with scenes of daily...
- S Social Studies Explain how the character of the daughter in “Two Kinds” shapes the plot of the story. How do her personality and actions determine or affect events? Use relevant details...
Ответ:
67.52
Step-by-step explanation:
So lets split it up.
First lets find the value of the dress when it is 20% off.
Then, lets find what it cost with 5.5% tax.
20% of a number is 1/5. We need to subtract 1/5 of 80 from 80. Or, in other words, we need to get 4/5 of 80.
So lets first divide 80 by 5, then multiply the 4.
Basically diving by the denominator, and multipling by the numerator. This is a useful trick when finding the fractional value of a number.
So:
80/5=16
A easy way to know what you get when dividing by 5s, is to take the number, multiply it by 2, then remove the 1s place.
As we can see: 2*80 is 160
Remove the ones place: 160 = 16
So we can see that 16 is our 20% of 80.
Remember, the question says we must remove 20% of the 80 dollars, so we must subtract 16 from 80:
80-16=64
So now we need to increase 64 by 5.5% to find the tax increase, and get our answer.
This is how I found my
Put the 5,5% into decimal form - 0.055
Multiplied the 64 by the 0.055
5*64=320 - when multiplying by 5, we can divide the number by 2, then add a zero. This is the opposite of the dividing 5 trick,
64/2=32 + 0 = 320
Since theer is a 5 in the tenths place, and the hundreths. I just added this in twice:
3.20+0.320 = 3.52
This is 5.5% of 64.
Remember, we are increasing the price by 5.5%, so we are adding this to 64:
64+3.52=67.52
This is your answer.
Hope tihs helps!
Ответ: