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
kap26 [50]
3 years ago
9

At least how many grams of copper must be alloyed with 387 g of pure silver to produce an alloy that is no more than 90% pure si

lver
Mathematics
1 answer:
cricket20 [7]3 years ago
5 0

Let c = grams of copper to be added

(grams of silver) / (grams of copper and silver) < = .90

387+%2F+%28c+%2B+387%29+%3C=+.9

387+%3C=+.9%28c+%2B+387%29

387+%3C=+.9c+%2B+348.3

.9c+%3E=+387+-+348.3

.9c+%3E=+38.7


c+%3E=+43g

At least 43 grams of copper must be added

check:

387+%2F+%28c+%2B+387%29+%3C=+.9

387+%2F+%2843+%2B+387%29+%3C=+.9

387+%2F+430+%3C=+.9

.9+%3C=+.9

You might be interested in
Simplify the following expression:
Morgarella [4.7K]

Answer:

2nd option

Step-by-step explanation:

Given

2x - 8y + 3x² + 7y - 12x ← collect like terms

= 3x² + (2x - 12x) + (- 8y + 7y)

= 3x² + (- 10x) + (- y)

= 3x² - 10x - y

8 0
3 years ago
How many times does 23 go into 194?
USPshnik [31]
The answer is approximately 0.11857
7 0
3 years ago
Read 2 more answers
1. How can you tell that a point on the graph is a maximum or minimum?
spin [16.1K]

Answer:

1) To see whether it is a maximum or a minimum, in this case we can simply look at the graph. f(x) is a parabola, and we can see that the turning point is a minimum. By finding the value of x where the derivative is 0, then, we have discovered that the vertex of the parabola is at (3, −4).

2

6 0
3 years ago
If A = 56, then find c
trapecia [35]

Answer:

Since A= 56 then B=56 so A+B=112

The whole tringle must be 180 degrees

So 180-112=68

SO C=68

I believe

6 0
3 years ago
I WILL GIVE BRAINLIEST TO WHOEVER IS CORRECT!
Natali5045456 [20]
The correct answer would be 6
7 0
3 years ago
Read 2 more answers
Other questions:
  • 7+ (-5)+(-2)=0<br> 7+ (5)+(2)=0<br> 7+(-4)+(-3)=0<br> 7+(-6)+(-1)=0
    8·2 answers
  • Please help! will give brainlist <br>​
    6·2 answers
  • Which of the following equations could be used to solve the given equation?
    14·1 answer
  • Could someone please help me with this
    15·1 answer
  • what is the portion of a line that starts at one point and goes off in a particular direction to infinity
    7·2 answers
  • In the diagram, the measure of angle 3 is 105°
    7·1 answer
  • Please answer asap I'll mark brainliest​
    9·2 answers
  • Joy bought 288 small pieces of candy to share with her friends. She divided the candy into 18 bags. One of the bags will be shar
    15·1 answer
  • Timothy swam 24 laps . Frank swam 72 laps. How many times as many laps did frank swim than timothy?
    6·1 answer
  • Can someone please help me with this? Thank you!! &lt;3
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!