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3 years ago

What is the value of x in the equation 1 x – 8 = 4x + 12?

Mathematics

2 answers:

Cloud [144]3 years ago

5 0

Answer:

x = - $\frac{20}{3}$

Step-by-step explanation:

Given

x - 8 = 4x + 12 ( subtract 4x from both sides )

- 3x - 8 = 12 ( add 8 to both sides )

- 3x = 20 ( divide both sides by - 3 )

x = - $\frac{20}{3}$

Bess [88]3 years ago

3 0

Answer:

The value of x is -20/3.

Step-by-step explanation:

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I75,986

velikii [3]

Step-by-step explanation:

1a. 75,986

1b. Seventy five thousand nine hundred eighty six.

1c. 75,986=this one

$7 \times10000 + 5 \times 1000 + 9 \times 100 + 8 \times 10 + 6 \times 1$

1d. 70,000

1e 80

I did not understand the rest. Hope it's useful..... 

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3 years ago

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The circle below is centered at the point (3, 1) and has a radits of length 2.

Kruka [31]

Answer:

Step-by-step explanation:

$Step 1: The- equation- of -a- circle- with -center -at- (h,k)- and- a -radius- of- r- is:\\(x-h)^2+(y-k)^2=r^2\\In -this -question ,h=3, k=1 and r=2, so- after- substituting- into- above -formula- we- get:\\(x-3)^2+(y-1)^2=2^2\\(x-3)^2+(y-1)^2 = 4\\ x^2-6x+9+y^2 -2y+1-4=0\\x^2-6x+y^2-2y+6=0$

3 0

3 years ago

Why is a graphical solution not always appropriate for a system of equations?

BigorU [14]

Answer:

because it may not be suitable for all the time

4 0

3 years ago

5. -4n + 7 + 2n =1

Minchanka [31]

5.
-4n+ 7+ 2n= 1
⇒ (-4n+ 2n)+ 7= 1 (combine like terms)
⇒ -2n= 1-7
⇒ -2n= -6
⇒ n= -6/(-2)
⇒ n= 3

Final answer: B. 3~

6. 4(y-4)= 8
⇒ y-4= 8/4
⇒ y-4= 2
⇒ y= 2+4
⇒ y= 6

Final answer: D. 6~

3 0

3 years ago

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The quality-control department of Starr Communications, a manufacturer of video-game DVDs, has determined from records that 1.5%

Sunny_sXe [5.5K]

Let A represents the event that DVD has a video effect.
So,
P(A) = 1.5 %

Let B represents the event that DVD has a audio defect.
So,
P(B) = 0.8 %

A ∩ B represents that DVD has both audio and video defect.
So,
P(A∩B) = 0.4%

Part a)
A ∪ B represents that DVD has a video or audio defect.

P(A∪B) = P(A)+P(B)-P(A∩B) = 1.5 + 0.8 - 0.4 = 1.9%

Thus the probability that the DVD purchased by the customer has a video or audio defect is 1.9%.

Part b)
The complement of P(A∩B) will represent the probability that the DVD does not have video or audio defect.

So, the probability that DVD purchased by customer does not have video or audio defect is 1 - 0.4 = 0.96%

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3 years ago