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
Ilia_Sergeevich [38]
2 years ago
12

The lenght of a rectangle is 4 cm less than three times the width. the perimeter is 64 cm

Mathematics
2 answers:
dybincka [34]2 years ago
5 0
Let the width be x cm.
Then length=3x-4 cm.
Its perimeter is 64 cm.
We know that perimeter of a rectangle= 2(length+width)
So,
2(3x-4+x)=64
6x-8+2x=64
6x+2x=64+8
8x=72
x=9
Therefore,
length=(3×9-4)cm=(27-4)cm=23 cm.
Width=9 cm.
marusya05 [52]2 years ago
3 0
Let w be the width and l the length and 32 half of the perimeter
4-3w=32
-4        -4
--------------
-3w   =28
------   ------
  3         3

-1w     9 1/3
------    -------
  -1        -1
    w  = -9 1/3
The Width is -9 1/3 


You might be interested in
How many millilitres are they in two and a quater litres
Bess [88]
Mili means 1000 so 1000ml=1 L (ml=milileter, L=liter)
conversion factor
1L/1000ml=1 and
1000ml/1L=1
convert 2 and 1/4 L to ml
2 and 1/4L
try to convert with second conversion thing (1000ml/1L=1)
2 and 1/4L times 1000ml/1L=2000 and 1000/4 ml=2000 and 250 ml=2250 ml
5 0
3 years ago
What is the solution of the system of equations? -4x+3y=-12 -2x+3y=-18
Kisachek [45]

Answer:

Step-by-step explanation:

I've enclosed a graph to show you that there is one solution.

-4x + 3y = - 12

<u>- 2x + 3y = - 18</u><em><u>  </u></em><em>         </em>Subtract

-2x = 6                        Divide by - 2

-2x/-2 = 6/-2

x = - 3

- 4x + 3y = - 12

-4(-3) + 3y = - 12

12 + 3y = - 12

3y = - 12 - 12

3y = - 24

3y/3 = - 24/3

y = - 8

Which is exactly what the graph shows.

You can tell immediately that this has 1 or more solutions just by looking at the number in front of x and y in each each equation.

It's always a good idea to graph a question like this one. Desmos is a pretty good tool to use if you don't have a graphing calculator.

The y's are the same so you are 1/2 way home in saying what you did.

The x's are different so that means you have at least 1 solution.

7 0
3 years ago
Please help 60 points if you help me
AlexFokin [52]

She should have added 2 to both sides of the equation instead of subtracting 2.

2x -2 = 14

Add 2 to both sides:

2x = 16

Divide both sides by 2:

x = 8

3 0
2 years ago
Read 2 more answers
NEED TO KNOW ASAP<br> Which of the following is a quadratic inequality?<br> Oy&lt;2x+7<br> Oy Oy
Burka [1]

Answer:

  (c)  y < x^2 -5x

Step-by-step explanation:

A quadratic inequality is one that involves a quadratic polynomial.

<h3>Identification</h3>

The degree of a polynomial is the value of the largest exponent of the variable. When the degree of a polynomial is 2, we call it a <em>quadratic</em>.

For the following inequalities, the degree of the polynomial in x is shown:

  • y < 2x +7 . . . degree 1
  • y < x^3 +x^2 . . . degree 3
  • y < x^2 -5x . . . degree 2 (quadratic)

<h3>Application</h3>

We see that the degree of the polynomial in x is 2 in ...

   y < x^2 -5x

so that is the quadratic inequality you're looking for.

__

<em>Additional comment</em>

When a term involves only one variable, its degree is the exponent of that variable: 5x^3 has degree 3. When a term involves more than one variable, the degree of the term is the sum of the exponents of the variables: 8x^4y3 has degree 4+3=7.

8 0
1 year ago
Jasper plans to roll a standard six-sided die 3 times and record the result after each roll.
Alenkasestr [34]

Answer:

1/3 or 33 1/3  %

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Question Help Scores of an IQ test have a​ bell-shaped distribution with a mean of 100100 and a standard deviation of 1010. Use
    10·1 answer
  • Someone please help I will do anything please help
    5·2 answers
  • I bought 4 1/2 lb of bananas for 3.98. What is the price per pound of bananas? A. $.88 B. $1.13 C. $1.88
    15·1 answer
  • What is the missing angle
    14·2 answers
  • If Steve multiplied his purchase price by 1.08 to get his total bill, what percent sales tax was he paying?
    8·1 answer
  • What is the base of a parallelogram if the height is 6 5/8 feet and area 26 1/2 square feet?​
    5·1 answer
  • A college student takes the same number of credits each semester. She had 15 credits when she started, and after 4 semesters, sh
    13·1 answer
  • HELP............................................................................................................................
    15·1 answer
  • Find the mean of the given data,<br> 5.6, 5.2, 4.6, 4.9, 5.7, 6.4
    11·1 answer
  • Calculate the magnitude of the angle ABC from the breeze data
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!