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3 years ago

Evaluate 9-8/s when s=4

Mathematics

2 answers:

sveta [45]3 years ago

8 0

Answer:

Step-by-step explanation:

BASIC DIVISION! It's not that hard :) All you have to do is see what 8/4 is (2) and then subtract 9-2 to get 7!

Alinara [238K]3 years ago

7 0

Answer:

$\frac{1}{4}$ = 0.25

Step-by-step explanation:

$\frac{9-8}{4}$

9-8 = 1

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Answer:

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Step-by-step explanation:

The inverse is basically you just swapping x and y. People want to solve it for y to make it a function of x.

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step by step explanation :

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3 years ago

How would I solve this Rational Equation? Solve for all values of x.

Nesterboy [21]

9514 1404 393

Answer:

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Step-by-step explanation:

I like to put these in the form f(x) = 0. We can do that by subtracting the right side. Common factors can be cancelled from numerator and denominator, provided they are not zero.

$\dfrac{7}{x+3}+\dfrac{3}{x-3}-\dfrac{x}{x-3}=0\\\\ \dfrac{7(x-3)+(x+3)(3-x)}{(x+3)(x-3)}=0\\\\\dfrac{(x-3)(4-x)}{(x-3)(x+3)}=0\\\\ \dfrac{4-x}{x+3}=0\qquad x\ne3\\\\x=4 \qquad\text{equate the numerator to zero, add $x$}$

_____

If you leave the numerator as (x-3)(4-x), then there are two values of x that make it zero. Because x=3 makes the equation "undefined", it cannot be considered to be a solution.

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