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ANEK [815]
3 years ago
12

Help me out please it’s homework

Mathematics
2 answers:
Alekssandra [29.7K]3 years ago
8 0

Answer:

4. +4 , -4

Step-by-step explanation:

I did number 4 and 6 instead.

4. x^{2} +32=16

do opposite of +32 to even out equation, so subtract 32 from 16, 16-32= -16

no u have x^2 = -16

to get rid of the exponent we must do the opposite of it, a square root, to both sides. so the square root of -16 is x= +4 or -4

Neko [114]3 years ago
4 0

Answer:

  1. 7
  2. 7 i
  3. 4
  4. 4 i

Note:

I'm sorry! I only figured out the first 4. And I'm sorry if those are incorrect as well!!!

But I do hope it helps a little!

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cricket20 [7]

The cost of 1kg of coal mined from the ore is $0.0397

Data;

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<h3>The Cost of 1kg of Coal</h3>

To find the cost of 1kg of coal, we can simply and equate 1 ton to its equivalent in ton and the solve.

1ton = 907kg\\

let's write this and equate it

1 ton = $35.99

907kg = $35.99

1kg = x

Let's cross multiply both sides and solve for x

907kg = \$35.99\\1kg = x\\x = \frac{1 * 35.99}{907} \\x = \$0.0397

The cost of 1kg of coal is $0.0397

Learn more on proportions here;

brainly.com/question/870035

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Answer:

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