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
geniusboy [140]
3 years ago
11

A rectangle with an area of 81 cm² has a length that is 3 times the width. How long is the width of the rectangle? Round to the

nearest tenth.
Mathematics
2 answers:
iren2701 [21]3 years ago
4 0

Answer:

60.75 ≈ 60.8

Step-by-step explanation:

4u-> 81

1u -> 20.25 (width)

3u-> 60.75 (length)

LenaWriter [7]3 years ago
3 0

Answer:

W ≈ 5.2 cm

Step-by-step explanation:

Represent the length and width by L and W respectively.

Then L * W = 81 cm^2, and L = 3W.

Substituting 3W for L in the first equation, we get:

3W * W - 81 = 0, or 3W^2 - 81 = 0.

To make it easier to find the final answer, rewrite 3W^2 - 81 = 0 as

            81

W^2 = ------- = 27

              3

Then W (the width) is the positive square root of 27, or W ≈ 5.2 cm

You might be interested in
Consider the functions f(x) = 3x2, g(x)=1/3x , and h(x) = 3x. Which statements accurately compare the domain and range of the fu
Genrish500 [490]

Answer:

all of the functions have a unique range ⇒ answer 1

Step-by-step explanation:

* Lets revise how to find the domain and the range of the function

- The domain is all values of x that make the function defined

- The range is the set of all output values of a function

∵ f(x) = 3x²

- It is a quadratic function

- There is no values of x make this function undefined

∴ The domain of f(x) is all real numbers

- To find the range calculate the vertex of the function

∵ f(x) = ax² + bx + c

∵ f(x) = 3x²

∴ a = 3 , b = 0 , c = 0

∵ h = -b/2a

∴ h = 0/2(3) = 0/6 = 0

∵ k = f(h)

∴ k = f(0) = 3(0)² = 0

∴ The vertex of the cure is (0 , 0)

∵ k is the minimum value of the parabola

∴ The range of f(x) is all real numbers greater than or equal

  to zero ⇒ (1)

∵ g(x) = 1/3x

- It is a rational function

- to find the values of x which make the function undefined equate

 the denominator by 0

∵ 3x = 0 ⇒ divide both sides by 0

∴ x = 0

∴ The domain of g(x) is all real numbers except zero

∵ We can not put x = 0, then there is no value of g(x) at x = 0

∴ The range of the g(x) is all real number except zero ⇒ (2)

∵ h(x) = 3x

- It is a linear function

∵ There is no values of x make this function undefined

∴ The domain of h(x) is all real numbers

∴ The range of h(x) is all real numbers ⇒ (3)

* From (1) , (2) , (3) the answer is

 all of the functions have a unique range

# Look to the attached graph to more understand

The red graph is f(x)

The blue graph is g(x)

The green graph is h(x)

8 0
3 years ago
Read 2 more answers
Find the volume of a right circular cone that has a height of 17.8 ft and a base with a radius of 17.8 ft. Round your answer to
Alona [7]

Answer:

5905.9 ft  

Step-by-step explanation:

5 0
3 years ago
Simplify the algebraic expression (8x + 16y)/2 + 4(x - y)
Karo-lina-s [1.5K]

It's 8x + 16y/2 + 4x - 4y :))

5 0
3 years ago
Read 2 more answers
I WILL GIVE BRAINLIEST!
Illusion [34]

Answer:

24 ft cubed

Step-by-step explanation:

The volume of a rectangular prism is denoted by the formula: V=lwh , where l is the length, w is the width, and h is the height.

Looking at the diagram, we can see that the length is 2 ft (so l = 2), the width is 4 ft (so w = 4), and the height is 3 ft (so h = 3). Now, we can just plug in these values to find V, the volume:

V=lwh

V=2*4*3=24

Thus, the answer is 24 ft cubed.

Hope this helps!

7 0
4 years ago
Read 2 more answers
What is the probability that someone in chicago is stung by a bee
AysviL [449]

Step-by-step explanation:

0.075 % is the probability of that

6 0
3 years ago
Other questions:
  • You and your friend are going to eat some candy .You eat 3/4 of a box of candy. Your friend eats 1/2 as much candy ay you do . H
    11·1 answer
  • On the blueprint of a house, 39 millimeters represents 6 meters. The length of the living room is 52 millimeters on the blueprin
    10·1 answer
  • Your teacher spent 55$ on tulips and daffodils. a pot of tulips cost 5$ and a pot of daffodils cost 4$. if your teacher bought 1
    9·2 answers
  • Find the median<br> of 38,37,39,41,38,42,48,50,54
    10·1 answer
  • PLEASE ANSWER ASAP
    8·2 answers
  • I'm not sure how to solve this... Could anyone please help me?
    8·1 answer
  • Easy rational numbers question!-help!
    11·1 answer
  • Please help me with this i don’t understand
    7·1 answer
  • Plz help I will give brainliest<br> What is the value of x in this problem<br> 97x+14=13.8
    6·1 answer
  • What is -1 1/2, -12, -4.3 least to greatest
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!