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nekit [7.7K]
3 years ago
14

If a and b are both positive numbers and a values?

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
7 0
Your question isn’t clear
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A metalworker has a metal alloy that is 15​% copper and another alloy that is 60​% copper. How many kilograms of each alloy shou
coldgirl [10]

18 kg of 15% copper and 72 kg of 60% copper should be combined by the metalworker to create 90 kg of 51% copper alloy.

<u>Step-by-step explanation:</u>

Let x = kg of 15% copper alloy

Let y = kg of 60% copper alloy

Since we need to create 90 kg of alloy we know:

x + y = 90

51% of 90 kg = 45.9 kg of copper

So we're interested in creating 45.9 kg of copper

We need some amount of 15% copper and some amount of 60% copper to create 45.9 kg of copper:

0.15x + 0.60y = 45.9

but

x + y = 90

x= 90 - y

substituting that value in for x

0.15(90 - y) + 0.60y = 45.9

13.5 - 0.15y + 0.60y = 45.9

0.45y = 32.4

y = 72

Substituting this y value to solve for x gives:

x + y = 90

x= 90-72

x=18

Therefore, in order to create 90kg of 51% alloy, we'd need 18 kg of 15% copper and 72 kg of 60% copper.

6 0
2 years ago
PLEASE HELP
MAXImum [283]

The answer is x=34 degrees.

6 0
2 years ago
Read 2 more answers
Anyone know the answer?​
Aleksandr-060686 [28]
I’m pretty sure it’s d but i’m not 100%
5 0
3 years ago
Please help asap 20 pts
My name is Ann [436]
C because 5 is (5,0)
8 0
3 years ago
Answer all questions shown
FromTheMoon [43]
SOH CAH TOA

—>

Sin D = 13 sqrt3/26 = 0.76
Sin E = 13/26 = 0.47
Cos D = 13/26 = 0.87
Cos E = 13 sqrt3/26 = 0.64
7 0
2 years ago
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