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andreev551 [17]
3 years ago
12

What is the simplified form of each expression? -(4)^-2

Mathematics
1 answer:
Tcecarenko [31]3 years ago
7 0
The answer is C: 1/4^2
there is a rule that says when a^-k= 1/a^k
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Zoe thinks of a number. She multiplies it by 3 and adds 4. She gets the same answer when she adds 5 to the number and then multi
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Answer:

Zoe's number is 6

Step-by-step explanation:

Let the number be 'n'

a) Multiply 'n' by 3 ⇒ n*3 = 3n

  Add 4 to '3n' ⇒ 3n + 4

Add 5 to 'n' ⇒  n +5

Multiply (n+ 5) by 2 ⇒ (n +5)*2 = 2n + 5*2 = 2n + 10

    3n + 4 = 2n + 10

b) 3n + 4 = 2n + 10

Subtract 4 form both sides

       3n = 2n + 10 - 4

       3n = 2n + 6

Subtract 2n from both sides

    3n - 2n = 6

          \sf \boxed{\bf n = 6}

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Step-by-step explanation:

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tatiyna

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Step-by-step explanation:

4=4

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4 years ago
Water makes up about 71% of Earth's surface, while the other 29% consists of continents
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Step-by-step explanation:

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