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andrezito [222]

3 years ago

14

A container full of water weighs 15.5 lbs. When ¼ of the water is poured out, the container now weighs 12 ½ lbs. How much does t

he container weigh when empty?

1 answer:

posledela3 years ago

5 0

Answer:

3.5 lbs.

Step-by-step explanation:

1/4 of the water is dumped, meaning that is 3 lbs. 1/4 is 3 lbs. 3x4 is 12. 15.5 - 12 = 3

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Answer:

20 grams of an alloy containing 25% silver has to be melted with 50 grams of an alloy containing 60% silver to obtain a final alloy containing 50% silver

Step-by-step explanation:

Hi

We define

$A_{a}=50g @ 60\%$ , wich means alloy a has 50 grams containing 60% silver.

$A_{b}=xg @ 25\%$ , wich means alloy b has x grams containing 25% silver.

So we can build an equiation $50 \times 0.60+x \times 0.25=\frac{1}{2}(50+x)$ , as half of the final alloy has to be silver. Then solving for x

$30+0.25x=25+0.5x\\30-25=0.5x-0.25x\\5=0.25x\\x=\frac{5}{0.25}=20$

Wich means 20 grams of an alloy containing 25% silver ( $A_{b}$ ) has to be melted with 50 grams of an alloy containing 60% silver ( $A_{a}$ ) to obtain a final alloy containing 50% silver.

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4 years ago

Apply the distributive property to create an equivalent expression.

Anika [276]

Hi there!

»»————-　★　————-««

I believe your answer is:

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»»————-　★　————-««

Here’s why:

⸻⸻⸻⸻

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»»————-　★　————-««

Hope this helps you. I apologize if it’s incorrect.

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