1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marat540 [252]
3 years ago
5

A small painting has an area of 400 cm2. The length is 4 more than 2 times the width. Find the dimensions of the painting. Solve

by completing the square. Round answers to the nearest tenth of a centimeter.
PLEASE HELP! I WILL MARK AS BRAINLIEST!
Mathematics
1 answer:
Nezavi [6.7K]3 years ago
8 0

400 = 8x * x

400 = 8x^2

400 / 8 = x^2

root/50 = x

7.1cm = x

You might be interested in
F(x)=x-1/x^2-5x+6 encontrar dominio <br> Y negativas
raketka [301]

Answer:

nhn kgtmnbgcjcbrhjcknthdgjkr

Step-by-step explanation:

hinc6drkthujrvhjknjbmkghjn

7 0
3 years ago
SEE ATTACHED
fenix001 [56]
To me personally, the first bit f(g(x)) is easy and the domain is tricky. Let's try explain this.

A function takes an input number and returns an output number depending on the function. Look at f(x) = x+3, if we let the input number be 2 then we say that f(2) = 5. We could do f(π) to give us π+3 or even f(x²) to give us x² +3. The trick is to substitute the input into the function equation.

You have been asked to find f(g(x)). You know f(x) = \frac{1+x}{1-x}. Putting numbers in at this point would be easy (try work out f(2), you'll do it really quick) but you have to put in g(x).

f(g(x)) = \frac{1+g(x)}{1-g(x)}
we also know that g(x) = \frac{x}{1-x} so we can say that
f(g(x)) = \frac{1+ \frac{x}{1-x} }{1- \frac{x}{1-x} } and that is f(g(x)) but the question requires that we simplify it so
\frac{1+ \frac{x}{1-x} }{1- \frac{x}{1-x} }  =  \frac{ \frac{1-x}{1-x} +  \frac{x}{1-x} }{ \frac{1-x}{1-x} - \frac{x}{1-x} } =  \frac{ \frac{1}{1-x} }{ \frac{1-2x}{1-x} } =  \frac{1}{1-2x}

f(g(x)) = \frac{1}{1-2x}

Now for the tricky bit (for me, at least). The domain is the full set of values that you can 'put in to' the function and still get a real value out. So how do we work out what numbers 'break' the function? I like to use the fact that DIVIDING BY ZERO IS IMPOSSIBLE. What value of x can we put into the function to make it so the function is being divided by 0? i.e. 1-2x = 0 solve that and you have a value of x that isn't part of the domain.

This means the domain is all real numbers EXCEPT the solution to that equation. (Because if we put that value into f(g(x)) it's impossible to get a value out.)

[I know this was a lot to read, if you have any questions or don't get anything feel free to message me or leave a comment.]

5 0
3 years ago
Explain answer !! <br><br> ( WILL GIVE BRAINLEST)
kicyunya [14]

Answer:

25-7

Step-by-step explanation:

"Substitute for": Replace x with ____

Since it is given that x = 25 -y, we can replace the x in 5x + y = 10 with 25 - y by the substitution property of equality.

6 0
2 years ago
Read 2 more answers
For the following data, find
Alla [95]
A and d is answer I just need points please
5 0
3 years ago
"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students
dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71

95% confidence interval would be

\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

7 0
3 years ago
Other questions:
  • What is the range data set of 34,36,52,49,47,34,4051?
    5·1 answer
  • The great owlet moth has a wingspan of 12.13 inches.write this number as a mixed number.
    10·2 answers
  • Mark said he can decompose <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B5%7D%7B6%7D%20" id="TexFormula1" title=" \frac{5}{6} "
    13·1 answer
  • a boy flies a kite with 100 foot long string. the angle of elevation of the string is 48. how high is the kite from the ground.
    10·1 answer
  • 9.42 multiplied by 6.83
    11·1 answer
  • Line b and line c are perpendicular at the point (4,2). If the equation of line b is y=2x, what is the equation for line c?
    8·1 answer
  • Helen designs a rectangle with an area of 225 square units. her rectangle is the largest rectangle( that is the rectangle with l
    10·1 answer
  • 1. What is the probability of getting a red marble out of a bag when there are 4 red
    15·2 answers
  • - 2 1/3 - (-5) =<br><br><br><br><br> gimme please, its the i ready thingie
    8·2 answers
  • If i can finish 1 class every 2 days how many days would it take to finish 42 classes
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!