3 years ago

870 g of brass contains 40 percent zinic and the rest is copper.find the mass of zinic and copper in the alloy

Mathematics

2 answers:

asambeis [7]3 years ago

7 0

Mass of zinc = 40/100*870 = 348

Mass of Copper = 60/100*870 = 522

Therefore, the mass of zinic in the alloy is 348 and the mass of copper in the alloy is 522.

Agata [3.3K]3 years ago

3 0

Step-by-step explanation:

Mass of Zinc = 870g * (40/100) = 348g.

Mass of Copper = 870g - 348g = 522g.

You might be interested in

A number plus itself, plus twice itself, plus 4 times itself is equal to -104

NARA [144]

The scenario will will be represented by: $x+x+2x+4x=-104$

The number will be -13

Step-by-step explanation:

We have to convert the given situation into the mathematical form

Let x be the number

Then

"a number plus itself"

x+x

"plus twice itself"

x+x+2x

"plus 4 times itself"

x+x+2x+4x

"is equal to -104"

$x+x+2x+4x=-104$

This can also be written as:

$x+x+2x+4x=-104\\8x=-104\\Dividing\ both\ sides\ by\ 8\\\frac{8x}{8}=\frac{-104}{8}\\x=-13$

Keywords: Linear Equation

Learn more about linear equation at:

#LearnwithBrainly

7 0

3 years ago

Volume of cone is 1,610.82 cubic meters what is the height

allochka39001 [22]

h = 19 Meters

To make sure it's the correct answer, plug it in the volume formula for a cone.

8 0

3 years ago

If a single one of these can be answered, can someone help me? I put my book somewhere. I’ll mark brainliest to actual answers :

Alisiya [41]

16. Anaerobic means Without oxygen

5 0

3 years ago

Read 2 more answers

What is the answer to number 23

vesna_86 [32]

So 50/27 is your answer

6 0

3 years ago

You are researching the average emails received per day. You want to know how many employees you should survey if you want to kn

IrinaK [193]

Answer:

The value is $n =29 \ employees$

Step-by-step explanation:

Generally the number of employee to survey(sample size) is mathematically represented as

$n = [ \frac{z * \sigma }{E} ]^2$

Here E is the margin of error which is given as E = 47

So substituting 1.645 for z and 155 for $\sigma$

$n = [ \frac{1.645 * 155 }{47} ]^2$

=> $n =29 \ employees$

5 0

4 years ago

870 g of brass contains 40 percent zinic and the rest is copper.find the mass of zinic and copper in the alloy​

870 g of brass contains 40 percent zinic and the rest is copper.find the mass of zinic and copper in the alloy