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3 years ago

7

-2(6 + 2x) + {(2x - 12) = -6?

2 answers:

Advocard [28]3 years ago

5 0

Answer:

x = -9

Step-by-step explanation:

Let's solve your equation step-by-step.

−2(6+2x)+2x−12=−6

Step 1: Simplify both sides of the equation.

−2(6+2x)+2x−12=−6

(−2)(6)+(−2)(2x)+2x+−12=−6(Distribute)

−12+−4x+2x+−12=−6

(−4x+2x)+(−12+−12)=−6(Combine Like Terms)

−2x+−24=−6

−2x−24=−6

Step 2: Add 24 to both sides.

−2x−24+24=−6+24

−2x=18

Step 3: Divide both sides by -2.

−2x

−2

=

18

−2

x=−9

Please mark me brainllest!!

sertanlavr [38]3 years ago

4 0

Answer:

x = -9

Step-by-step explanation:

-2(6 + 2x) + (2x - 12) = -6

Distribute

-12 -4x +2x -12 = -6

Combine like terms

-24 -2x=-6

Add 24 to each side

-24+24 -2x= -6+24

-2x = 18

Divide by -2

-2x/-2 = 18/-2

x = -9

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The lifetime of a certain type of battery is normally distributed with mean value 15 hours and standard deviation 1 hour. There

KIM [24]

Answer:

If the lifetime of batteries in the packet is 40.83 hours or more then, it exceeds for 5% of all packages.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 15

Standard Deviation, σ = 1

Sample size = 4

Total lifetime of 4 batteries = 40 hours

We are given that the distribution of lifetime is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

Standard error due to sampling:

$\displaystyle\frac{\sigma}{\sqrt{n}} = \frac{1}{\sqrt4} = 0.5$

We have to find the value of x such that the probability is 0.05

P(X > x) = 0.05

$P( X > x) = P( z > \displaystyle\frac{x - 40}{0.5})=0.05$

$= 1 -P( z \leq \displaystyle\frac{x - 40}{0.5})=0.05$

$=P( z \leq \displaystyle\frac{x - 40}{0.5})=0.95$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 40}{0.5} = 1.64\\x = 40.825 \approx 40.83$

Hence, if the lifetime of batteries in the packet is 40.83 hours or more then, it exceeds for 5% of all packages.

8 0

3 years ago

PETS Each month Travis spends $20 for premium food$10 for treats $18 for grooming, and $3 for toys for his pet. Write an express

jok3333 [9.3K]

Answer:

$492 per year

Step-by-step explanation:

The first step we take towards solving this question is to add all the numbers we were given as money spent(excluding that of the month)

$20 + $10 + $18 + $3 = $41 per month

This means that a total of $41 was spent per month.

Going further, since we're told it's 12 months, we then multiply it by 12, and thus, we have

$41 * 12 = $492 per year

Therefore, the total money spent is $492 per 12 months, or per year

5 0

3 years ago

102+900=1002 More. Then 100

Ksivusya [100]

Hello!

I don't exactly understand your question. If you mean to be asking whether or not 1002 is geater than 100, it is.

If you mean to be asking to add it: 102 + 900 + 100 = 1102

5 0

3 years ago

Read 2 more answers

If you are given the graph of a line and are asked to write the equation of a perpendicular line, does it matter what the y-inte

kogti [31]

Yes because the y intercept would be a different value for the new equation unless it is zero

5 0

3 years ago

What is the value of x?

Tom [10]

Answer:

x=21

Step-by-step explanation:

100+3x+x-4=180

100+4x-4=180

96+4x=180

4x=180-96

4x=84

x=21

7 0

2 years ago