1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sever21 [200]
3 years ago
7

A jar containing only nickels and dimes contains a total of 60 coins. the value of all the coins in the jar is $4.45. solve by e

limination to find the amount of nickels and dimes that are in the jar.
Chemistry
1 answer:
weqwewe [10]3 years ago
7 0
1 nickle = 5 cents

1 dime = 10 cents

$4.45 = 445 cents

let

n = the number of nickles, n>=0

d = the number of dimes, d>=0

a jar containing only nickels and dimes contain a total of 60 coins:

n + d = 60

the value of all the coins in the jar is $4.45:

5n + 10d = 445

by solving the system of equations:

n + d = 60

5n + 10d = 445

we find:

n = 31 nickels

d = 29 dimes
You might be interested in
Where does the production of the following drugs take place?
aleksandr82 [10.1K]
Takes place in USA and Mexico
4 0
3 years ago
Read 2 more answers
Please Help!!
Oksi-84 [34.3K]

Answer:

2K + Br2 --> 2KBr is the answer

4 0
3 years ago
A chemical reaction produces 56.2 grams of iron (II) sulfide (FeS). How many moles of iron (II) sulfide does the reaction produc
Soloha48 [4]

Answer:

0.639

Explanation:

8 0
3 years ago
142Pm &gt; 142 Nd +<br> what is the answer to this equation
erastova [34]

Explanation:

nnbbnmkmknn bnnnbbtbbbbn' nn' t

4 0
2 years ago
What attractive forces must be overcome when CsI is dissolvedin<br> liquid HF?
bagirrra123 [75]

Answer:

The attractive forces must be overcome are :

  • Ion- ion interaction
  • Dipole - Dipole  
  • Hydrogen Bonding  

Explanation:

For the compound to dissolve the attractive forces existing between atoms of the compound must be reduced

<u>CsI is ionic compound </u><em>and its molecules are held together by ionic(electrostatic) force . These force must be weakened for its dissolution</em>

Forces in HF <em>:</em>

<em>1 .Hydrogen Bonding :  In HF strong intermolecular Hydrogen Bonding exist between the electronegative F and Hydrogen</em>

2. Dipole - dipole : <em>HF is polar . So it is a permanent dipole and has dipole diople interaction</em>

4 0
3 years ago
Other questions:
  • What is the PH of 8.1x10^-5 M HCLO4 solution
    10·1 answer
  • For a 0.50 molal solution of sucrose in water, calculate the freezing point and the boiling point of the solution.
    10·1 answer
  • Which of the samples pictured is most likely a nonmetal?
    5·1 answer
  • Need the helps thoooo
    15·2 answers
  • A solution is known to contain an inorganic salt of one of the following elements. The solution is colorless. The solution conta
    15·2 answers
  • Melissa and ashley play tennis every afternoon. Twenty minutes into the game they both start to breath heavy, sweat, and feel th
    8·1 answer
  • The four structures that both prokaryotic and eukaryotic cells have are
    5·1 answer
  • How many molecules of oxygen are in 3.0 moles of oxygen?
    13·2 answers
  • A student needs 7.6 liters of a 0.18 molar solution for an experiment. How many grams of solute does the student need if the mol
    5·1 answer
  • Calculate the quantity of electricity obtained from 2 moles of electrons​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!