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
Fudgin [204]
2 years ago
11

Length of a rectangle is three times its breadth. Perimeter of the rectangle is 40 cm. Find its length and width.

Mathematics
1 answer:
Harrizon [31]2 years ago
6 0

Answer:

The length is 15 and the width is 5

Step-by-step explanation:

Let the breadth  be x cm then its length be 3x.

Perimeter of the rectangle = 2 (x+3x)

40=2(x+3x)

40=8x

x=5

breadth = 5

length = (5×3) = 15

You might be interested in
An environmental science teacher at a high school with a large population of students wanted to estimate the proportion of stude
AnnZ [28]

Answer:

60 students

Step-by-step explanation:

The confidence interval of a proportion is given by:

p\pm z*\sqrt{\frac{p*(1-p)}{n} }

Where 'p' is the proportion of students who responded 'yes', 'z' is the z-score for a 95% confidence interval (which is known to be 1.960), and 'n' is the number of students in the sample.

If the confidence interval is from 0.584 to 0.816, then:

p=\frac{0.584+0.816}{2}=0.7 \\0.816-0.584=2*(1.96*\sqrt{\frac{p*(1-p)}{n}}) \\0.116=1.96*\sqrt{\frac{0.7*(1-0.7)}{n}}\\n=16.8966^2*(0.7*0.3)\\n=60\ students

60 students were in the sample.

8 0
3 years ago
What is In algebraic expression
IgorLugansk [536]

Expression without an equal sign with at least one variable

Hope this helps!

5 0
3 years ago
Please help
tia_tia [17]

Answer:

The answer to your question is letter B.

Step-by-step explanation:

Data

Center = (-10, 6)

radius = 8

Process

1.- To find the answer to your question just substitute the values in the standard form of the circle.

Equation

                    (x - h)² + (y - k)² = r²

h = -10

k = 6

r = 8

Substitution

                   (x + 10)² + (y - 6)² = 8²

Simplification

                   (x + 10)² + (y - 6)² = 64

8 0
3 years ago
Which value for x makes the sentence true?<br><br> 2.45 + x = 3.64
Scrat [10]

Answer:

1.19

Step-by-step explanation:

You're trying to figure out what x is here.

So you'll want to isolate the x. That means, get it alone.

Since both sides are equivalent, when you subtract 2.45 from the x side, you also subtract it from the other side too.

x = 3.64 - 2.45

x = 1.19

7 0
3 years ago
Read 2 more answers
Use factoring to solve the quadratic equation. 2x^2=5X+3
prohojiy [21]
Move everything to one side
Equation
2x^2 - 5x -3 = 0
Sq rt means square root or radical sign
Quadratic equation-> x = - (b) +/- Sq rt b^2 -4ac
2a
- (-5) +/- Sq rt (-5)^2 - 4(2)(-3)
2 (2)
5 +/- Sq rt 25 + 24
4
Sq rt 29 = 5.38
5 + Sq rt 29 divides over 4 and 5 - Sq rt 29 divides over 4.
4 0
3 years ago
Other questions:
  • A student was given an assignment to determine the percentage of students that brought a bag lunch to school. The student chose
    9·2 answers
  • Help me please thank you
    13·1 answer
  • The work shows the first steps of writing a partial fraction decomposition.
    12·1 answer
  • Which expression can be used to find the surface area of the following square pyramid
    9·2 answers
  • 20 points and brainliest to whoever answers first correctly!!
    9·2 answers
  • Please help with the second question
    15·1 answer
  • Three students earned $48.76 at the bake sale. The students split the earnigs evenly,how much did each student receive
    12·2 answers
  • Graph the line with the given point and slope. the line that passes (2,-2) with slope 1/4
    14·1 answer
  • (15, 31) is rotated 90 ° counterclockwise which coordinates gives me
    10·1 answer
  • One of the exterior angle is 120° and the interior opposite angles are in the ratio 1:5. Find the interior opposite angles of th
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!