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mamaluj [8]
2 years ago
15

A jeweler wants to combine a 60% gold alloy with a 20% gold alloy to make 1000 grams of 50% gold alloy. How many grams of 60% al

loy should be used?
Mathematics
1 answer:
kramer2 years ago
7 0

Answer:

750 grams of 60% alloy

Step-by-step explanation:

Define x = amount of 60% alloy and y = amount of 20% alloy

Equating the amounts of gold:

0.6x+0.2y = 1000(0.5)

Since there must be 1000 grams total:

x+y = 1000

Writing the 2 resulting equations together:

0.6x + 0.2y = 500

x + y = 1000

Multiply the first equation by 5:

3x + y = 2500

x + y = 1000

Subtracting the 2nd equation from the 1st:

2x = 1500

x = 750

Answer: 750 grams of 60% alloy

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Barbra can walk 3,200 meters in 24 minutes. How far can she walk in three minutes.
lisabon 2012 [21]

Answer:

Step-by-step explanation:

To find how far she can walk in 3 minutes, we need to find how fast she can walk in 1 minutes. We do this by dividing the distance she walked by the time she walked. Lets do so.

3200/24=133.33

She walks 133.33 meters per minute. Now to find her distance in 3 minutes w multiply this number by 3.

133.33*3=400

Barbra walks 400 meters every 3 minutes.

3 0
3 years ago
there are 22 loaves of white bread, 17 loaves of wheat bread, and 19 gourmet breads. What is the total number of loaves?
Airida [17]
Hello!

Judging by the question you have provided I have come up with an equation to solve the problem at hand. 

Based on the question you have provided I figured that there are two types of bread displayed being: loaves and gourmets.
To find the total amount of loaves of bread you would need to add up the total amount of each type of loaves.
The equation for this is 22+17.

Your answer should be 39 loaves of bread.

Hope this helped!
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3 years ago
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what are the prices?

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3 years ago
Round 4184 to the nearest hundereth
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