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Vinil7 [7]
3 years ago
9

What division problem does the model show?​

Mathematics
1 answer:
garik1379 [7]3 years ago
3 0

Answer:

54/3

Step-by-step explanation:

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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 ASAP!<br> a. 4<br> b. 8<br> c. 16<br> d. 24<br> which one????
Alexeev081 [22]

Answer:

A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z

8 0
3 years ago
Read 2 more answers
jenny receives total employee benefits that are 24.5% of her gorss annual pay.if jenny has a gross annual pay of 70,000 how much
patriot [66]
You can change 24.5% by moving the decimal point
24.5%=.245
70,000 x .245=$17,150
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3 years ago
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