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3 years ago

15

The number of minutes spent talking on the phone, m, and the amount of a cell phone bill, a. What is the independent variable

1 answer:

antoniya [11.8K]3 years ago

7 0

Answer: the independent variable would be m (minutes spent talking on the phone)

Explanation: the cell phone bill will be affected by how many minutes is spent talking on the phone. However the nothing will affect how many minutes is spent on the phone.

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Tems11 [23]

Answer:

D) $(x + \frac{5}{2})^{2} = \frac{9}{4}$

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given equation

<em> x² + 5 x + 8 = 4</em>

⇒ $x^{2} + 2 X \frac{5}{2} x + (\frac{5}{2} )^{2} - (\frac{5}{2} )^{2}+ 8 = 4$

<u><em>Step(ii):</em></u>-

By using (a + b)² = a² + 2 a b + b²

⇒ $(x + \frac{5}{2})^{2} - (\frac{5}{2} )^{2}+ 8 = 4$

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⇒ $(x + \frac{5}{2})^{2} = (\frac{25-16}{4} )$

⇒ $(x + \frac{5}{2})^{2} = \frac{9}{4}$

<u><em>Final answer:-</em></u>

$(x + \frac{5}{2})^{2} = \frac{9}{4}$

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