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Mkey [24]
3 years ago
15

What is the answer to 8-x=3x

Mathematics
2 answers:
Andrew [12]3 years ago
8 0
Move the 8 over
-x=3x-8
Move the 3x over
-x-3x=8
-4x=8
Divide by -4
x=-2
Shalnov [3]3 years ago
4 0
3x = 8 - x
4x = 8
x = 2
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plain why the function is discontinuous at the given number a. (Select all that apply.) f(x) = x2 − 2x x2 − 4 if x ≠ 2 1 if x =
ElenaW [278]

Answer with Step-by-step explanation:

We are given that

f(x)=\left\{\begin{matrix}\dfrac{x^2-2x}{x^2-4}&,if\ \ x\neq 2 \\ 1&,if\ \ x=2\end{matrix}\right.

We have to explain that why the function is discontinuous at x=2

We know that if function is continuous at x=a then LHL=RHL=f(a).

f(x)=\frac{x(x-2)}{(x+2)(x-2)}=\frac{x}{x+2}

LHL=Left hand limit when x <2

Substitute x=2-h

where h is small positive value >0

\lim_{h\rightarrow 0}f(x)=\lim_{h\rightarrow 0}\frac{2-h}{2-h+2}

\lim_{h\rightarrow 0}\frac{2-h}{4-h}=\frac{2}{4}=\frac{1}{2}

Right hand limit =RHL when x> 2

Substitute

x=2+h

\lim_{h\rightarrow 0}f(x)=\lim_{h\rightarrow 0}\frac{2+h}{2+h+2}=\lim_{h\rightarrow 0}\frac{2+h}{4+h}

=\frac{2}{4}=\frac{1}{2}

LHL=RHL=\frac{1}{2}

f(2)=1

LHL=RHL\neq f(2)

Hence, function is discontinuous at x=2

4 0
3 years ago
What is the standard form of (1+2√-3)/(1+√-3)
miv72 [106K]
1.75+0.43301270i
hope this helped and let me know if i was right plz

7 0
3 years ago
Read 2 more answers
Tori examined the pattern of exponents in the table.
gregori [183]

Answer:

The value of b = 1/36

As exponent decreases, each previous value is divided by 6

If the table was extended, the value of 6^-3 would be 1/216

Step-by-step explanation:

Given in the question a table containing power of 6

We will use negative rule of exponent to write the equivalent of negative power of 6

b^{-n}= 1 / b^{n}

we know that

6^{1}=6

so

6^{-1} =\frac{1}{6^{1} }

= 1/6

and

6^{2} = 36

So,

6^{-2} = \frac{1}{6^{2} }

=

\frac{1}{36}

8 0
3 years ago
Read 2 more answers
Can I get help with part B &amp; C
Bingel [31]
B) y = 25x - 49, 870
C) 2015

3 0
3 years ago
What is an equation of the line that is parallel to y=3x-8 and passes through the point (4,-5)
Anna [14]
Pareallell lines have same slope
y=mx+b, m=slope
y=3x-8 so we need
y=3x+b
find b

so given (4,-5)
we can subsitute the point
(x,y)
(4,-5)
x=4 then y=-5

so
-5=3(4)+b
-5=12+b
-17=b


y=3x-17 is equation
D is answer
3 0
3 years ago
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