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
lapo4ka [179]
3 years ago
12

For thousands of​ years, gold has been considered one of the​ earth's most precious metals. one hundred percent pure gold is​24-

karat gold, which is too soft to be made into jewelry. most gold jewelry is​ 14-karat gold, approximately​ 58% gold. if​ 18-karat gold is​ 75% gold and​ 12-karat gold is​ 50% gold, how much of each should be used to make a​ 14-karat gold bracelet weighing 200 ​grams?
Mathematics
1 answer:
Leona [35]3 years ago
6 0
14 karat gold is 58.3333...% gold
We have 75% gold and 50% gold and we need to make 200 grams of 58.3333...% gold.

A) x + y = 200

B) .75x + .50y = ( (14/24) * 200)
We multiply equation B) by -1.3333... and get
B) -x -.6666...y = -155.5555... then adding A)
A) x + y = 200  we get

.3333...y = 44.4444...

y = 133.3333... grams 12 karat gold
x = 66.6666... grams  18 karat gold

Double-Checking the answer
133.3333... * .5 = 66.6666...
66.6666 * .75 = 50.0000...

Concentration of final solution = (66.6666... + 50) / 200 = 58.3333...% which is 14 karat gold


You might be interested in
Kedir bout 200 eggs for Birr 50 Birr and sells them for Birr 0.30 each.
ella [17]

Answer:

Yes, Kedir made profit.

Step-by-step explanation:

0.30 x 200 = 60 Birr

60 Birr is more than 50 Birr

He made profit of 10Birr, which is 20% of 50 Birr

8 0
2 years ago
A smart phone manufacturer wants to determine the average battery time that it’s new smart phone will get. The manufacturer will
sasho [114]

Answer:

Note: <em>The full question is attached as picture below</em>

<em />

1. The manufacturer is taking a sample of her friends, which is most convenient to sample - Convenience sampling

2. The whole population is divided into different groups (strata) and random samples are drawn from each group - Stratified sampling

3. The population is divided into different clusters (here, communities) and whole clusters are surveyed - Cluster sampling

4. The samples are drawn at a fixed interval from the population list - Systematic sampling

5. The samples are randomly drawn from the population - Simple random sampling

7 0
3 years ago
Colton wrote a ratio comparing the number of sports video games that he owns to the number of driving video games that he owns a
nordsb [41]

D. If you were to say the given ratio aloud, it would go something like this: 4 to 3, 4,3 or 4 sports video games to 3 driving ones. So, the answer is 4 to 3, or answer D.

6 0
3 years ago
Is this a function? PLEASE THIS IS URGENT!!!!
trapecia [35]

Answer:

<h2>NO</h2>

Step-by-step explanation:

A function only gives ONE output but that right there gives two!

6 0
3 years ago
Use a proportion to determine how many assistants are employed in an office if there are 32 executive and each executive has an
Artemon [7]

Answer:

48

Step-by-step explanation:

I got it right

5 0
3 years ago
Other questions:
  • 18 is 240% of what? basic percent equation ...?
    10·2 answers
  • Solve the inequality for x. <br> 8x-30&lt; -5 (4- 2x) <br> _
    11·1 answer
  • How many tennis balls do you need to balance to scale
    13·2 answers
  • Is 80 a multiple of 4?
    14·2 answers
  • 25w^2+60w+36 factor completely
    13·1 answer
  • Jamilia was moving to a new city. she researched the rates charged by the local utility company for water. she found the listing
    14·1 answer
  • Can someone help me with my perfect square homework? thank you.
    10·2 answers
  • Which statement best describes the solutions of this equation? 4/3x+1 = x/2x+10
    8·1 answer
  • £8001 is shared equally between 9 people. How much does each person get?
    5·1 answer
  • Use the transitive property of equality to finish the equations
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!