skylar7192
13.09.2020 •
Mathematics
What percent of 33.5 is 21?
Solved
Show answers
More tips
- H Health and Medicine How to Help Men Gain Weight?...
- A Auto and Moto Discovering the Leader: What is the Most Expensive Car in the World?...
- H Health and Medicine Hangover: How to Get Rid of It Quickly?...
- S Style and Beauty How to Choose the Right Fur Coat and Avoid Regrets?...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
Answers on questions: Mathematics
- M Mathematics There are 144 votes for the homecoming dance. John had twice as many votes as Jack, but James had 18 more votes than three times the amount of Jack. How many votes...
- M Mathematics The dot plot below shows how many campsites have each number of campers. What is the mean absolute deviation of the data set shown? Plezz help :(...
- M Mathematics Find the remainder when $1 + 2 + 2^2 + 2^3 + \dots + 2^{100}$ is divided by 7....
- M Mathematics Mrs. Reid’s storage bin is 3 feet long, 2 feet wide, and 5 feet tall. Can she fit 34 boxes that each has a volume of 1 cubic foot in her bin?...
- M Mathematics You have 23 coins, including nickels, dimes, and quarters. if you have two more dimes than quarters, and the total value of the coins is $2.50. how many of each...
Ответ:
Ответ:
d + q = 25
10d + 25q = 400
From first equation find d:
d = 25 - q
Then replace it in second equation:
10(25 - q) + 25q = 400
250 - 10q + 25q = 400
250 + 15q = 400
15q = 400 - 250
15q = 150
q = 150 / 15 = 10
Now replace q in first equation with found value:
d + 10 = 25
d = 25 - 10 = 15
So, Kirsten has 15 dimes and 10 quarters.