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3 years ago

If the variable was replaced with a number how would you simplify?

1 answer:

8 0

Let's say we have an equation like this 7x + 3. Let x = 4. Then we will do the following:

7(4) + 3 - Replace the x with 4
28 + 3
31 - simplify down

You might be interested in

Solve for x. 4x - y= -11

balandron [24]

Step-by-step explanation:

$4x - y = - 11$

$4x = - 11 + y$

$4x = y - 11$

$x = \frac{y - 11}{4}$

3 0

1 year ago

5) Write the expression as a product of two factors.

rosijanka [135]

Answer:

c) is the right answer.

Step-by-step explanation:

The Skills needed are: GCF, Division, and Factoring

If you want a product of 2 factors, and you have 2 variables, one of the factors will be a number.

Here we have:

12x + 18y-60

1) We need to find the GCF (Greatest Common Factor) of all coefficients (12,18, and 60)

-12's factors are: 1,2,3,4,6,12

-18's factors are: 1,2,3,6,9,18

-60's factors are: 1,2,3,4,5,6,10,12,15,20,30,60

The GCF, or the biggest factor all these numbers share is: 6

2) So we can take out the 6 from all of these.

-12x/6=2x

-18y/6=3y

-60/6=10

Our new expression with the 6 taken out would be: 6(2x + 3y - 10)

The only answer that has this is c)

Hope you understood and have a nice day!!

4 0

3 years ago

A sample of 8 buttons is randomly selected and the following diameters are measured in inches. Give a point estimate for the pop

kenny6666 [7]

Answer:

$\bar X= \frac{1.83+1.85+1.79+1.73+1.69+1.74+1.76+1.70}{8}= 1.76125$

Now we can estimate the population variance with the sample variance given by:

$s^2 = \frac{\sum_{i=1}^n (x_i -\bar X)^2}{n-1}$

And replacing we got:

$s^2 = 0.0033839$

And the estimator for the population deviation $\sigma$ is given by :

$\hat \sigma = \sqrt{s^2}= \sqrt{0.0033839}= 0.058172$

Step-by-step explanation:

For this case we have the following data given:

1.83,1.85,1.79,1.73,1.69,1.74,1.76,1.70

First we need to calculate the mean with the following formula:

$\bar X= \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X= \frac{1.83+1.85+1.79+1.73+1.69+1.74+1.76+1.70}{8}= 1.76125$

Now we can estimate the population variance with the sample variance given by:

$s^2 = \frac{\sum_{i=1}^n (x_i -\bar X)^2}{n-1}$

And replacing we got:

$s^2 = 0.0033839$

And the estimator for the population deviation $\sigma$ is given by :

$\hat \sigma = \sqrt{s^2}= \sqrt{0.0033839}= 0.058172$

7 0

4 years ago

Find the simple interest earned to the nearest cent for each principal, interest rate, and time. $750, 7%, 3 years

Zanzabum

750 x 3 x7 hope that helps

6 0

3 years ago

Read 2 more answers

. Help please hurry Complete the table by plugging in the X value to solve for the y value

UkoKoshka [18]

Answer:

-1

Step-by-step explanation:

if I understand correctly, Y= x+4, you should add all the numbers in the X column by 4

Example:

-7

-7 plus 4 would be -3

the reason for this is when adding negative numbers you always go down instead of going up because if you add the way we add normal number then you will keep going deeper into the negative numbers.

Hope this helps!

8 0

3 years ago