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2 years ago

Which domain restrictions apply to the rational expression?

Mathematics

1 answer:

dimulka [17.4K]2 years ago

5 0

1) it must be fulfilled that the denominator is different from zero, then for this expression

x^2 -9 ⇒ x^2-3^2 = (x-3)(x+3)⇒ (x-3)(x+3) = 0 ⇒ x = 3 o x = -3 , the dominium is all numbers reals except 3 and -3

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Change equation into slope intercept form 4x+5y=20

asambeis [7]

the slope intercept form would be y = 4 /5 x-4

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2 years ago

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Solve each system of equations by writing a new system that eliminates one of the variables.

Rufina [12.5K]

Answer:

$x=33\\y=-41$

Step-by-step explanation:

Let:

$2x+y=25\hspace{5}(1)\\and\\4x+3y=9\hspace{5}(2)$

We need to eliminate one of the variables, so let's use elimination method. First multiply (1) by 2

$2*(1)\equiv\hspace{5}4x+2y=50$

Now subtract (2) from 2*(1) in order to eliminate x:

$2*(1)-(2)\\4x-4x+2y-3y=50-9\\-y=41$

Solving for y:

Multiplying both sides by -1

$y=-41$

Finally, replacing the value of y in (1)

$2x-41=25$

Solving for x:

add 41 to both sides:

$2x=66$

Multiply both sides by 1/2:

$x=\frac{66}{2} =33$

3 0

2 years ago

Please solve them I really need help

Ugo [173]

Answer:

Answers are below

Step-by-step explanation:

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8 0

2 years ago

Quick please no links or anything just the straight up answer answer both please

bearhunter [10]

Answer: B. 41

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2 years ago

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tiny-mole [99]

that is unsolvable coz no double decimal can be used

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2 years ago