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Aleonysh [2.5K]
2 years ago
10

Brass is made up of copper and zinc. 100 grams of brass contains 20 grams of zinc.

Mathematics
1 answer:
Nana76 [90]2 years ago
5 0

Answer:

A.  12 grams Zn

B.  280 g of copper.

Step-by-step explanation:

100 grams of brass

20 grams of zinc

100 grams of brass has 20 grams of Zn.

20/100 = 0.200  Zn   <u>20% Zn  and 80% copper</u>.

A.  (60 g brass)*(0.2) = 12 grams Zn

B.  (350 g brass)*(0.80) = 280 g of copper.

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C. 1oo because 100 * 150 = 15000
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Martha was recarpeting her bedroom, which was 15 feet long and 10 feet wide. How many square feet (the area) will she need to pu
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Answer:

150 Square feet

Step-by-step explanation:

15 feet long

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3 0
3 years ago
Find the least common denominator for these two rational expressions. B/b^2 -64 -7b/b^2+7b-8
san4es73 [151]

Answer:

The least common denominator is (b-8)(b+8)(b-1)

Step-by-step explanation:

We are given expression as

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Firstly, we will factor both denominators

b^2-64=b^2-8^2=(b-8)(b+8)

b^2+7b-8=(b+8)(b-1)

so, we can plug it back

\frac{b}{(b-8)(b+8)}-\frac{7b}{(b+8)(b-1)}

First term denominator is

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Second term denominator is

(b+8)(b-1)

So,

Least common denominator will be

(b-8)(b+8)(b-1)

So, we get

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3 0
3 years ago
Divide the difference of 18 and 3 by the sun of 1 and 2​
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Okay.

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4 0
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Answer:

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3 years ago
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