3 years ago

Help on 3 I do not get it

Mathematics

1 answer:

Rama09 [41]3 years ago

8 0

The answer is nine hope this helps :)

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Elimination <br> 2x - 5y = 8 <br> x - 3y = -1

ruslelena [56]

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2 years ago

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Tpy6a [65]

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2 years ago

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Blababa [14]

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7 0

2 years ago

Read 2 more answers

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

kramer

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

7 0

1 year ago