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3 years ago

Solve for a 5/a - 2/1-a = 2/a-1 a=0 a=-1 a=1 none

1 answer:

8 0

Hello :
$\frac{5}{a} - \frac{2}{1-a} = \frac{2}{a-1} = \frac{5}{a}+ \frac{2}{a-1} = \frac{2}{a-1}
= \frac{5(a-1)+2a}{a(a-1)} = \frac{2a}{a(a-1)} 
(a \neq 1 , a \neq 0)
$
5a-5 +2a =2a
5a =5
a=1 ( refused)
conclusion : <span>none</span>

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A company offers four plans for customers who want to rent DVDs and video games. The cost of the plans can be modeled by a linea

Luba_88 [7]

To solve this, we are going to use the slope formula, and the point slope formula.
Slope formula: $m= \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$
where
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$(x_{1},y_{1})$ are the coordinates of the first point.
$(x_{2},y_{2})$ are the coordinates of the first point.
Point-slope formula: $y-y_{1}=m(x-x_{1})$

Plan A. Coordinates of the first point: (1,14) (number of discs, cost). Coordinates of the second point: (2,17). Lets replace those values in our slope formula:
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Now that we have the slope, we can use the point slope formula:
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$y-14=3(x-1)$
$y-14=3x-3$
$y=3x+11$
Remember that in a linear equation of the form $y=mx+b$ , $m$ is the slope and $b$ is the y-intercept. In our model the y-intercept is the membership fee.
Since $b=11$ in our linear equation, we can conclude that the membership fee is $11

Plan B. Coordinates of the first point (1,12). Coordinates of the second point (2,16).
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$m= \frac{16-12}{2-1}$
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Plan C. Coordinates of the first point: (1,10). Coordinates of the second point: (2,15).
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$m= \frac{15-10}{2-1}$
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Part D. Coordinates of the first point: (1,12). Coordinates of the second point (2,21).
$m= \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$
$m= \frac{21-12}{2-1}$
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3 years ago

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If there is 2 digits and 7 numbers the combos would be:
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3 years ago

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3 years ago

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Answer:

= 3/2 * 5/3 - 5/4 + 1/2

= 5/2 - 5/4 + 1/2

= 5/4 + 1/2

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3 years ago