cksbanks
11.11.2020 •
Mathematics
The video store charges an initial fee of $10.00 plus $15.00 a day to rent an Y-box. Which equation relates the cost (c) of renting the Y-box to the number of days (d) the Y-box is used?
Solved
Show answers
More tips
- F Food and Cooking Why Doesn t the Confirmation Link Come to Email?...
- L Leisure and Entertainment What Movies You Should Watch: A Guideline to Make the Right Decision...
- F Family and Home How to Choose a Baby Stroller: Tips from Experienced Parents...
- H Health and Medicine 5 Simple Steps to Quit Smoking for Good...
- H Health and Medicine Coughing: Causes, Types, and Treatment Methods...
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- 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...
Answers on questions: Mathematics
- M Mathematics Pls help ( if you can’t read it it says, a toddler weighs 30.0 pounds. If 1.00 Newton equals the weight of 0.228 pounds, what is the weight of the toddler in units of newtons)...
- M Mathematics Abox contains one yellow, two red, and three green balls. two balls are randomly chosen without replacement. define the following events: : { one of the balls is yellow } : { at...
- P Physics In the figures, two charged objects are surrounded by grass seeds that have been aligned by an invisible force. What is producing that force?...
- M Medicine Visualizing your performance and how you’d achieve a successful audition is . A) an effective method of blocking wanted feelings. b)a way to cope with stress. c)not effective in...
Ответ:
so
0.05n + 0.10d + 0.25q = 4.65
the we are given that there are "three more quarters than dimes"
this translates to
q = d + 3
or
d = q - 3
then we are also given that there are "twice as many nickels as quarters"
this translates to
n = 2q
we plug d = q - 3 and n=2q
into the first equation and solve for q
0.05(2q) + 0.10(q-3) + 0.25q = 4.65
we distribute/multiply
0.10q + 0.10q - 0.30 + 0.25q = 4.65
then add like terms
0.45q - 0.30 = 4.65
then add 0.30 to both sides
0.45q = 4.95
then divide both sides by 0.45
and we get
q = 4.95/0.45 = 11
therefore there are 11 quarters