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soldier1979 [14.2K]
3 years ago
8

4^-2 x 7^-2 equivalent expression

Mathematics
1 answer:
Savatey [412]3 years ago
8 0

Answer:

Not sure exactly which equivalent expression you are looking for but my goal would be to write it without the negative exponent.

\frac{1}{28^2}

Step-by-step explanation:

They have the same exponent and it is multiplication.

There is a law of exponent that says (a \cdot b)^x=a^x \cdot b^x .

So we have 4^{-2} \cdot 7^{-2} equals (4 \cdot 7)^{-2}.

Let's simplify (4*7)^(-2).

Since 4*7=28, we can say (4*7)^{-2}=(28)^{-2}.

Some people really hate that negative exponent. All that - in the exponent means is reciprocal. So 28^{-2}=\frac{1}{28^2}.

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Step-by-step explanation:

8 0
3 years ago
Solve x2 − 7x = −12
zheka24 [161]

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7 0
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prohojiy [21]

Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

<u>Geometry</u>

  • All angles in a triangle add up to 180°

Step-by-step explanation:

<u>Step 1: Set up Equation</u>

(7x - 1) + 80 + (6x - 3) = 180

<u>Step 2: Solve for </u><em><u>x</u></em>

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  2. Isolate <em>x</em> term:                              13x = 104
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Step-by-step explanation:

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