Hi right now im doing homework about common denominators and for some reason I cant understand how to do it

2 answers:

6 0

It would be great if you added some more details, but for common denominators you try to find the least common number that the 2 or more of the numbers you got have!
For example:
1/2 and 2/3 if you multiply 2 by 3 and 3 by 2, they both are 6, so you would multiply 1/2 both by 3 to make it into 3/6 and 2/3 by 2 to make it into 4/6!

Irina18 [472]3 years ago

6 0

Basically you have to find the lcm for the common denominator so that you can add/subtract them

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Which domain restrictions apply to the rational expression? x^2+4x+4 / x^2−4 Select each correct answer x≠−4 x≠−2 x≠0 x≠2 x≠4

Degger [83]

The correct answers are x≠2 and x≠(-2).

Domain restrictions are any points in the domain where the function will not have a value. This basically means that it's a point where x won't work in the function.

For the numerator, any value will work for x. We can have a value of 0 in the numerator, or a positive, negative, or decimal number.

However, the denominator cannot equal 0. This is because a fraction bar represents division, and we cannot divide by 0. The values that make the denominator 0 can be found by:

x²-4=0

Add 4 to both sides:
x²-4+4 = 0+4
x² = 4

Take the square root of both sides:
√x² = √4

x = 2 or x = -2.

7 0

2 years ago

Read 2 more answers

Solve the equation for the indicated variable (for q) <img src="https://tex.z-dn.net/?f=p%20%3D%20%20%5Cfrac%7Bq%7D%7B4%7D%20

Salsk061 [2.6K]

Answer:

q=4(p-r)

Step-by-step explanation:

p-r=q/4

4(p-r)=q

7 0

3 years ago