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Airida [17]
3 years ago
7

Evaluate. 8+3⋅42 Need help

Mathematics
2 answers:
Tpy6a [65]3 years ago
7 0
The answer is 134.

You have to follow the order of operations:
Paretheses
Exponants
Multiply
Divide
Add
Subtract

Because of this you have to multiply 3 by 42 first and get 126. Then you just add 8 and get 134.

Hope this helps!
Vedmedyk [2.9K]3 years ago
5 0
I hope this helps you

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Jess has 60 ounces of an alloy that is 40% gold. How many ounces of pure gold must be added to this alloy to create a new alloy
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Answer:

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Step-by-step explanation:

Jess has 60 ounces of an alloy that is 40% gold. How many ounces of pure gold must be added to this alloy to create a new alloy that is 75% gold?

Pure gold = 100% gold

Let the number of ounces of pure gold = x

Hence, we have the equation

40% × 60 ounces + 100%× x ounces = 75%(60 + x)ounces

= 0.4 × 60 + 1x = 0.75(60 + x)

= 24 + x = 45 + 0.75x

Collect like terms

x - 0.75x = 45 - 24

0.25x = 21

x = 21/0.25

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