2 years ago

Hello, help please X+7-10=12 8-X+4=10 5-6-X

Mathematics

1 answer:

LUCKY_DIMON [66]2 years ago

8 0

Answer:

x-7-10=12

x= 12-7+10

x=15

8-x+4=10

-x=10-8-4

-x=-2

x=2

5-6-x

-11-x

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Simplify the following expression. 4a^-2b A.) b/4a^2 B.)4b/a^2 C.)1/4a^b2

Sergio [31]

ANSWER

The correct answer is B

$\frac{4b}{ {a}^{2} }$

EXPLANATION

The given exponential expression is

$4 {a}^{ - 2} b$

We can rewrite this as,

$4b \times {a}^{ - 2}$

We need to simplify to obtain a positive index, so we apply the following property,

${a}^{ - m} = \frac{1}{ {a}^{m} }$

This implies that,

$4b \times {a}^{ - 2} = 4b \times \frac{1}{ {a}^{2} }$

This will finally simplify to,

$4b \times {a}^{ - 2} =\frac{4b}{ {a}^{2} }$

Therefore the correct answer is B

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2 years ago

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olga_2 [115]

Answer:

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