3 years ago

Mr. Martinez wants to get a cell-phone plan.He has two deals:

Mathematics

1 answer:

EastWind [94]3 years ago

5 0

Answer:

Deal B: Verizon is better

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(-2ab^-5)(4a^-2b)^-2

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Step-by-step explanation:

The applicable rules of exponents are ...

(a^b)(a^c) = a^(b+c)

(a^b)^c = a^(bc)

a^-b = 1/a^b

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3 years ago

Rewrite the equation by completing the square.<br> 4x² + 20r + 25 = 0<br> (x+...)^2=...

sattari [20]

Answer:

The equation $4\cdot x^{2} + 20\cdot x + 25 = 0$ is equal to $\left(x + \frac{5}{2} \right)^{2} = 0$ .

Step-by-step explanation:

Let be the equation $4\cdot x^{2} + 20\cdot x + 25 = 0$ , we proceed to rewrite the equation solely by algebraic means:

1) $4\cdot x^{2} + 20\cdot x + 25 = 0$ Given

2) $(2\cdot x)^{2} + 10\cdot (2\cdot x) + 25 = 0$ Definition of power/Associative property

3) $(2\cdot x + 5)^{2} = 0$ Perfect square trinomial

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5) $4\cdot (x + \frac{5}{2} )^{2} = 0$ Definition of power

6) $\left(x + \frac{5}{2} \right)^{2} = 0$ Compatibility with multiplication/Commutative and modulative properties/ $a\cdot 0 = 0$

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3 years ago