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skad [1K]
2 years ago
15

Brass is an alloy made from copper and zinc in the ratio 3:2, based on weight. If 120g of copper are needed for a certain piece

of brass, how much zinc will be needed for the same piece?
Mathematics
2 answers:
vagabundo [1.1K]2 years ago
7 0
The answer is 80.
You would first, divide 120 by 3.
Then, multiply 40 by 2.
Mkey [24]2 years ago
5 0
3 + 2 = 5 <span>Five parts of a whole

3/5 - cooper
2/5 - zinc

3/5 = 120g  [ * (5/3
3/5 *5/3 = 120g * 5/3
1 (100%) = 600/3g = 200g

200g * 2/5 = 400/5g = 80g zinc</span>
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max2010maxim [7]

Answer:

3) 27 cubed

4) 72 cubed

5) 125 cubed

8) 27 cubed. 3 is the length, 3 is the width, and 3 is the height.

9) 72 cubed. 6 is the length, 3 is the width, and 4 is the height.

10) 125 cubed. 5 is the length, 5 is the width, and 5 is the height.

Step-by-step explanation

Here's what to show if your teacher requires for you to show your work.

3) 3 x 3 x 3 = 27

4) 6 x 3 x 4 = 72

5) 5 x 5 x 5 = 125

8) 3 x 3 x 3 = 27

9) 6 x 3 x 4 = 72

10) 5 x 5 x 5 = 125

These are the ones I'd suggest putting the up and down form on.

10) and 5) Also put 5 x 5 = 25.          4) and 9) Also put 6 x 3 = 18.

     <em>2                                                        3</em>

     25                                                      18

  <u>x  5 </u>                                                     <u>x 4  </u>

   125                                                      72

Hoped this answered everything! Feel free to ask me if there's something I missed! :)

4 0
1 year ago
Which lengths could be the sides of a triangle?
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345,354,354,341,098cm
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