![cesarcastellan9](/avatars/25180.jpg)
cesarcastellan9
05.11.2019 •
Mathematics
Keana’s piggy bank contains $4.30 in nickels and dimes only. if she has 59 coins in her bank, then what is the sum of the digits in the number of nickels in keana’s bank? write a system of equations for this situation and find its solution.
Solved
Show answers
More tips
- S Style and Beauty How to Break in New Shoes: 7 Simple Methods...
- F Food and Cooking Delicious and Simple Fillings for Pies...
- 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?...
Answers on questions: Mathematics
- M Mathematics When is it best to use the graphing method to solve a system of equations...
- M Mathematics Solve the equation please i am so bad at algebra...
- M Mathematics G(t) = −3t^3 − 4t f (t) = 4t − 4 Find g(t) + f (t)...
- M Mathematics Hundred freee points im deltein this acc...
- M Mathematics Toby s bucket has a leak. The bucket starts with 5 gallons of water. After 7.5 minutes, there are only 2.5 gallons in the bucket of water. The equation is 5 + 7.5r=2.5...
- M Mathematics Join me in zoom with these other random people...
- M Mathematics Describe two ways you can find the measure of 7....
- M Mathematics What is the slope of the line through the points (5,2) and (-3, -7)....
- M Mathematics A flower garden is shaped like a circle. Its radius is 18yd . A ring-shaped path goes around the garden. The width of the path is 5yd . The gardener is going to...
- M Mathematics Go on this one But other than that stay here....
Ответ:
d = number of dimes
n + d = 59 {she has 59 coins total}
5n + 10d = 430 {value of coin times number of coins equals total value}
-5n - 5d = -295 {multiplied top equation by -5}
5n + 10d = 430 {bottom equation stays the same}
5d = 135 {added the two equations}
d = 27 {divided each side by 5}
n + d = 59 {first original equation}
n + 27 = 59 {substituted 27, in for d, into first original equation}
n = 32 {subtracted 27 from each side}
27 dimes
32 nickels
To answer the question, "what is the sum of the digits in the number of nickels?",
add 3 + 2
= 5
Ответ:
2x+18+5x-9
2x+5x18-9
7x+9
7. 7
x= 1.4
hope it helps