carma43
16.01.2021 •
Mathematics
Lily is selling ice cream cones and ice cream sandwiches. She sells 3 ice cream cones and 4 ice cream sandwiches for $14.25. She sells 5 ice cream cones and 2 ice cream sandwiches for $13.25. How much is an ice cream cone? How much is an ice cream sandwich?
Solved
Show answers
More tips
- W Work and Career How much does an honest traffic police officer earn in a day?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- L Leisure and Entertainment How to Learn to Draw Graffiti: Tips for Beginners...
- F Family and Home How to Remove Tar Stains: Tips and Recommendations from Experts...
- F Family and Home How to Remove Fading from Clothes: Tips and Tricks...
- S Sport How to Do a Jumping Split...
- H Health and Medicine How Did Inna Lose Weight on Dom 2?...
- F Family and Home How to Properly Fold Napkins in a Napkin Holder?...
- F Food and Cooking How to Set Up Ventrilo - The Ultimate Guide...
- S Science and Technology How to Make a Homemade Smoker: The Ultimate Guide...
Answers on questions: Mathematics
- E English So, I m on absolute phrases, and I have to combine a set of sentences so they have an absolute phrase. I get the concept, but these sentences are just odd to me, so if anyone...
- M Medicine Selena currently participates in weight training three times a week but would like to increase her cardiorespiratory fitness level. Which FITT principle does she need to adjust...
- C Chemistry Reservoirs can store water in what form...
- B Biology Which part of the heart pumps oxygen-rich blood away from the heart? left atrium right atrium left ventricle right ventricle...
Ответ:
cost of ice cream cones = $1.75
cost of ice cream sandwiches = $2.25
Step-by-step explanation:
Let
x = cost of ice cream cones
y = cost of ice cream sandwiches
3x + 4y = 14.25 (1)
5x + 2y = 13.25 (2)
Multiply (2) by 2
10x + 4y = 26.50 (3)
3x + 4y = 14.25 (1)
Subtract (1) from (3)
10x - 3x = 26.50 - 14.25
7x = 12.25
x = 12.25/7
x = $1.75
Substitute x = 1.75 into (1)
3x + 4y = 14.25
3(1.75) + 4y = 14.25
5.25 + 4y = 14.25
4y = 14.25 - 5.25
4y = 9
y = 9/4
y = $2.25
Ответ:
......................................