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3 years ago

What is the value of x?

Mathematics

1 answer:

Ket [755]3 years ago

6 0

Answer:

Step-by-step explanation:

As we can see in the picture, the bigger pentagon is a scale copy of the smaller one with a scale factor of 2. Hence, all the sides on the smaller pentagon multiplied by 2 gives us the bigger pentagon. We can find the scale factor by looking at the biggest side of the pentagon. Hope this helped, Thank you.

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Find the inverse of f(x)=(x−5)/(−4x−2)

uysha [10]

Answer:

${f}^{ - 1} (x)= \frac{ 5 - 2x }{ 4x + 1}$

Step-by-step explanation:

The given rational function is

$f(x) = \frac{x - 5}{ - 4x - 2}$

Let

$y = \frac{x - 5}{ - 4x - 2}$

Interchange x and y

$x= \frac{y- 5}{ - 4y - 2}$

Cross multiply

$x( - 4y - 2)= y- 5$

Expand

$- 4xy - 2x= y- 5 \\ - 4xy - y= 2x - 5 \\y( - 4x - 1)= 2x - 5$

Solve for y;

$y= \frac{ 2x - 5}{ - 4x - 1}$

$y= \frac{ 5 - 2x }{ 4x + 1}$

Therefore

${f}^{ - 1} (x)= \frac{ 5 - 2x }{ 4x + 1}$

7 0

3 years ago

Is the mean of 5 negative numbers positive or negative? explain

dimulka [17.4K]

Answer: Always negative

8 0

2 years ago

Find the sum of (x + 5) and (2x + 3)

Genrish500 [490]

What you can do is subtract 1x from each side
Then you subtract 3 from each side
Then it tells you x=2
Always put what you think x is back into the problem and see if it works out

Example on how you do it:
(x+5)=(2x+3)
5=(x+3)
2=x

7 0

3 years ago

the concrete slab under a garage measures 38 feet by 37 feet and is 6 inches thick. if concrete costs 150$ for a cubic yard, how

Natalka [10]

STEP 1
find cubic feet; multiply the three dimensions together; be sure to use the same unit of measure for all three dimensions: 6 inches is equal to 1/2'.

= 38' * 37' * 1/2'
multiply

= 703 cubic feet

STEP 2
divide cubic feet in step 1 by number of cubic feet in a cubic yard

27 cubic feet= 1 cubic yard

= 703 ÷ 27
= 26.037 cubic yards

STEP 3
multiply cubic yards in step 2 by cost per cubic yard

= 26.037 * $150
= $3,905.555
= $3,906 rounded to nearest dollar

ANSWER: It will cost $3,906 (rounded to nearest dollar).

Hope this helps! :)

3 0

2 years ago

Read 2 more answers

A real estate builder wishes to determine how house size (House) is influenced by family income (Income), family size (Size), an

creativ13 [48]

When analyzing the multiple regression model, the real estate builder should be concerned with Multicollinearity.

<h3 /><h3>What is Multicollinearity?</h3>

This is a phenomenon in regression analysis where some of the independent variables are correlated. This can present an issue because the correlation leads to less reliable results.

The income in this research is influenced by the education and they both influence family size. There is therefore an issue of multicollinearity here because some variables are correlated.

Find out more on Multicollinearity at brainly.com/question/16021902.

8 0

2 years ago