All categories

3 years ago

Look at the sample below 2x-8=12

Mathematics

1 answer:

guajiro [1.7K]3 years ago

5 0

Answer:

x = 10

Step-by-step explanation:

Make x the subject

2x - 8 = 12

2x = 12 + 8

2x = 20

x = 20/2

x = 10

You might be interested in

Writing a Verbal Expression for an Algebraic Expression

earnstyle [38]

Answer:

three times x to the power of four

3 0

3 years ago

Find the equation of this line y = [?]x + [ ] Please help

larisa [96]

<h2>Writing an Equation of a Line in Slope-Intercept Form</h2><h3>Answer:</h3>

$y = [ -2 ] x + [ 1 ]\\$

<h3>Step-by-step explanation:</h3>

Please refer to my answer from this Question to know more about Slope-Intercept Form: brainly.com/question/24599351

We must first find the slope.

Please refer to my Answer from this Questions to know more about Slopes of a Line:

brainly.com/question/24640665
brainly.com/question/24638053

We can see the marked points, $(0,1)$ and $(4, -7)$ , are on the line.

Solving for the slope:

$m = \frac{y_2 -y_1}{x_2 -x_1} \\ m = \frac{-7 -1}{4 -0} \\ m = \frac{-8}{4} \\ m = -2$

Now we can now solve for the $y$ -intercept.

Please refer to the second paragraph of my Answer from this Question to know more about y-intercepts: brainly.com/question/24606058

We can see that the line intersected the $y$ -axis at $(0,1)$ so $b = 1$ .

5 0

3 years ago

Suppose the time it takes a barber to complete a haircuts is uniformly distributed between 8 and 22 minutes, inclusive. Let X =

salantis [7]

Answer:

$P(X>14)= 1-P(X$

And replacing we got:

$P(X>14)= 1- \frac{14-8}{22-8}= 0.5714$

The probability that a randomly selected barber needs at least 14 minutes to complete the haircut is 0.5714

Step-by-step explanation:

We define the random variable of interest as x " time it takes a barber to complete a haircuts" and we know that the distribution for X is given by:

$X \sim Unif (a= 8, b=22)$

And for this case we want to find the following probability:

$P(X>14)$

We can find this probability using the complement rule and the cumulative distribution function given by:

$P(X$

Using this formula we got:

$P(X>14)= 1-P(X$

And replacing we got:

$P(X>14)= 1- \frac{14-8}{22-8}= 0.5714$

The probability that a randomly selected barber needs at least 14 minutes to complete the haircut is 0.5714

6 0

3 years ago

Pedro deposited $35 then withdrew $50 show number line graph

VARVARA [1.3K]

If you deposit $35, you can imagine drawing a green line (representing the money gained) to the 35 on the number line, which can be seen as moving 35 to the right. Fo withdrawing, imagine drawing a red line back 50 notches on the number line (representing money lost). The net effect that the deposit and withdrawal will have on your account balance is a $35-50=-15$ dollar loss, which can be represented on the number line as a line drawn to the point -15.

4 0

3 years ago

Simplify the expression. 3x 3x

valentina_108 [34]

Alright. If we're multiply 3x by 3x, we can think of this as :

3 × x × 3 × x (since 3x is really just 3 × x)

We see that since it's all being multiplied together, it doesn't matter what order we do. 3 times 3 is 9, so we now have

9 × x × x

When multiplying the same type of variables, we add their exponents. if an exponent isn't shown, it's understood that there's an invisible 1 there. So we really have x^1+1 once we multiply x×x. So really, x × x is x^2. so, I now have:

9 × x^2 or 9x^2

I see that this isn't an available solution. Please recheck your answers, or what the original problem was. I can assure you that with the info provided, 9x^2 is undoubtedly the answer. Perhaps you meant 3x + 3x?

For the second problem, we just have to see how many times we need to add 5 to itself until we get 20. How many times we have to add is how many months he has to save.

5 + 5 + 5 + 5 = 20

So, 4 times, means he has to save for 4 months.

Hope this helps, and please let me know what happened with question 1!

4 0

3 years ago