2 years ago

How do you subtract rational expressions without a common denominator?

1 answer:

4 0

You would have to make common denominators
consider a/b,c/d in Q
then a/b - c/d = ad/db - cb/bd = (ad-cb)/db for all a,b,c,d in R, exclude b,d=0
i.e. 1/2 - 1/4
=4/8 - 2/8 =(4-2)/8=2/8 =1/4

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How many solutions does this linear have y= 5x-1 -15x-3y=3?

musickatia [10]

-15x - 3y = 3

-15x - 3(5x-1) = 3 [input y]
-15x - 15x - 3 = 3 [distribute 3 over 5x and -1]
-30x - 3 = 3 [combine like terms]
-30x = 6 [add 3 to eliminate the negative]
x = $\frac{6}{-30}$ [divide by -30 to get x alone]
x = $\frac{1}{-5}$ [reduce the fraction]

Hopefully this is helpful enough to get you to your answer

4 0

2 years ago

Why is f(x)=0 the only odd and even function?

kupik [55]

F is odd if and only f f(-x) = -f(x) so f(x) = 0 works because 0 = 0 always.

f is even if and only if f(-x) = f(x) so f(x) = 0 works because there's no x term so nothing changes. 0 = 0.

6 0

2 years ago

Read 2 more answers

Which expression converts 4pi radians to degrees?

grin007 [14]

4pi/2pi = x/360
use a proportion
2 radians equals 360 degrees
x = 720 degrees

7 0

3 years ago

Read 2 more answers

5x7=<br> 5x7=5 x (_ + _)<br> 5x7= (5x _) + (5x_)<br> 5x7= _ + _<br> 5x7=

eimsori [14]

5x7=35
5x7=5x(5+2)
5x7=(5x3)+(5x4)
5x7=20+15
5x7=35

This is how I would do it :)