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
Lana71 [14]
3 years ago
9

Pls help!

Mathematics
1 answer:
Novay_Z [31]3 years ago
7 0

Answer:

The room has a width of three metres, and a length of seven metres.

Step-by-step explanation:

This is solvable using a system of equations.  First, we're told that its length is four metres more than its width:

l = w + 4

We're also told that it has a perimeter of 20, and know that the perimeter of a rectangle is equal to two times its length plus two times its length.  We can plug the given perimeter into that relationship, giving us:

20 = 2l + 2w

With that, we can simply substitute our first equation into it, replacing l, and then solve for w:

20 = 2l + 2w

20 = 2(w + 4) + 2w

20 = 2w + 8 + 2w

12 = 4w

w = 3

So the width is three metres.  We also know that the length is four metres more than that, telling us that it's seven metres.

We can check that my calculating the perimeter with those numbers and making sure it still matches 20

2 * 3 + 2 * 7

= 6 + 14

= 20

so the answer is good.

You might be interested in
4/3 x(2 x 1/3)= 3/4 x2(4 x 3/1=
Aleksandr-060686 [28]

Answer:

#1 Equation: 8/9

#2 Equation: 18

Step-by-step explanation:

No explanation for this problem.

--

Use: "PEMDAS"

P: Parenthesis

E: Exponents

M: Multiplication

D: Division

A: Addition

S: Subtraction

--

Did you learn this from Kindergarten?

#MathIsFun #LearnMathWithMe

7 0
3 years ago
Solve this equation: <br> x/5=-7
Marianna [84]

Answer:

x/5 = -7

Step-by-step explanation:

x = -35

I used a calculator pls let me know if im incorrect

3 0
3 years ago
Read 2 more answers
6y + 40 = 100<br> What is y?
Fantom [35]

\begin{gathered}\\ \sf\longmapsto 6y+40=100\end{gathered}

\begin{gathered}\\ \sf\longmapsto 6y=100-40\end{gathered}

\begin{gathered}\\ \sf\longmapsto 6y=60\end{gathered}

\begin{gathered}\\ \sf\longmapsto ⚘y=10\end{gathered}

8 0
3 years ago
Read 2 more answers
Consider the surface defined by the equation x3 + y3 + z3 = 3xyz. Use implicit differ- ∂z entiation to find ∂x. (Note z is not a
Aloiza [94]

Answer:    

   \frac{∂z}{∂x}=\frac{(3yz-3x^{2})}{3z^{2} -3xy}

Step-by-step explanation:

Given equation is x^{3}+y^{3}+z^{3}=3xyz ………………(1)

we use derivative formula \frac{d}{dx}(x^{n})  = n x^{n-1}

\frac{d}{dx}(x^{3)}  = 3 x^{2}

\frac{d}{dx}(z^{3)}  = 3 z^{2}

And also apply 'u v' formula

\frac{d}{dx}(uv})  = u\frac{d}{dx}(v)+v\frac{d}{dx}(u)

Differentiating  equation (1) partially with respective to 'x' , we treated 'y' as constant.

(3x^{2} +0+3z^{2}\frac{∂z}{∂x}) =3y(x\frac{∂z}{∂x}+z(1))   ( here y treated as constant so the derivative of constant function is zero in addition but in multiplication the constant is keep as like 'y').

on simplification , we get

(3x^{2} +0+3z^{2}\frac{∂z}{∂x}) =(3yx\frac{∂z}{∂x}+3yz)

again simplification, we get

3z^{2}\frac{∂z}{∂x}- 3yx\frac{∂z}{∂x}=3yz-3x^{2}

taking common '\frac{∂z}{∂x} on left on side , we get

(3z^{2}- 3yx)\frac{∂z}{∂x}=3yz-3x^{2}

dividing '(3z^{2}- 3yx) on both sides, we get

\frac{∂z}{∂x}=\frac{(3yz-3x^{2})}{3z^{2} -3xy}

<u>Final answer</u>:-

\frac{∂z}{∂x}=\frac{(3yz-3x^{2})}{3z^{2} -3xy}

6 0
3 years ago
WILL GIVE BRAINLEST AND ALOT OF POINTS!!!
ArbitrLikvidat [17]

The correct options to the questions will be:

1. True.

2. False.

3. A pathway and progression of your professional work life made up of a series of jobs.

4. True

5. A sense of achievement and satisfaction in our lives.

6. Strong work ethics

7. True.

8. False

9. Motivation

10. Skill

<h3>How to illustrate the information?</h3>

A job is paid work that leads to other jobs. This is true.

People typically plan to have the same job for the long-term. This is false.

A career is a pathway and progression of your professional work life made up of a series of jobs.

Careers often require specialized skills, training, or education. This is true.

Fulfillment means a sense of achievement and satisfaction in our lives.

Taking the tasks that you are given to you and working hard until they are completed shows a strong work ethics.

You are dependable if you say you will get a job done then follow through with it. This is true.

Abilities are life skills except sometimes you can do them without learning or practicing. This is false.

An employee who starts the day ready to go, is willing to work, and has the ability to take charge demonstrates motivation.

Something you do well that is learned by taking lessons and practicing is a skill.

Learn more about skills on:

brainly.com/question/1233807

#SPJ1

3 0
1 year ago
Other questions:
  • For question 24 please pick 1,2,3 or 4
    11·1 answer
  • Please help me answer this question
    5·1 answer
  • The perimeter of a rectangle is 108 inches. It is twice as long as it is wide.Find the length; the width.Draw the figure.
    12·2 answers
  • consider a pyramid with a height 10 feet in a square base with side lengths 7 feet. How does the volume of the pyramid change if
    6·1 answer
  • How do I find the value of x so f(x)=7​
    6·2 answers
  • The length of an object is measured as 45.8 centimeters. What is this measurement in scientific notation?
    6·1 answer
  • Find the ratio of the sides of a cube with volume 512 m to a cube with volume 1728
    8·1 answer
  • Which type of parent function does the equation f(x) = vc represent?
    5·2 answers
  • kyle took at total of 8 quizzes in the first 4 weeks of school. How many weeks of school will he have to attend before he will h
    15·1 answer
  • Find the dimensions of a rectangle
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!