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
Morgarella [4.7K]
3 years ago
10

Samuel tiene 11 cajas con mosaico cuadrado de 20 cm por lado y quiere cubrir una pared que mide 3 cm y de largo 2 cm de alto.Si

en caja hay 14 mosaicos,sera nesesario que compre mas cajas?
R=
Mathematics
1 answer:
kirza4 [7]3 years ago
4 0

Answer: Samuel no necesita comprar mas cajas.

Step-by-step explanation:

Cada mosaico es un cuadrado de 20cm por lado.

Entonces el área de cada mosaico es:

A = 20cm*20cm = 400cm^2.

En una caja hay 14 mosaicos, entonces cada caja puede cubrir:

14*400cm^2 = 5,600cm^2.

Ahora, el problema dice que la pared mide 3cm por 2 cm.

En ese caso, con un solo mosaico cubrirías la pared, entonces supongo que esta mal escrito.

Las dimensiones de la pared serian 3 metros por 2 metros.

1 m = 100cm

Entonces la pared es 300cm por 200cm.

El área total de la pared seria:

300cm*200cm = 60,000cm^2.

Ahora, cada caja de mosaicos cubre 5,600 cm^2.

Entonces el numero de cajas necesarias para cubrir toda la pared es:

(60,000cm^2)/(5,600cm^2) = 10.7

Entonces se necesitan 10.7 cajas para cubrir esa pared, y Samuel tiene 11, entonces el no necesita comprar mas cajas.

You might be interested in
What is the quadratic regression equation for the data set? ​ ​ ​ <br><br> PLEASEE HELP ME
Soloha48 [4]
You're trying to find constants a_0,a_1,a_2 such that \hat y=a_0+a_1\hat x+a_2{\hat x}^2. Equivalently, you're looking for the least-square solution to the following matrix equation.


\underbrace{\begin{bmatrix}1&6&6^2\\1&3&3^2\\\vdots&\vdots&\vdots\\1&9&9^2\end{bmatrix}}_{\mathbf A}\underbrace{\begin{bmatrix}a_0\\a_1\\a_2\end{bmatrix}}_{\mathbf x}=\underbrace{\begin{bmatrix}100\\110\\\vdots\\70\end{bmatrix}}_{\mathbf b}

To solve \mathbf{Ax}=\mathbf b, multiply both sides by the transpose of \mathbf A, which introduces an invertible square matrix on the LHS.

\mathbf{Ax}=\mathbf b\implies\mathbf A^\top\mathbf{Ax}=\mathbf A^\top\mathbf b\implies\mathbf x=(\mathbf A^\top\mathbf A)^{-1}\mathbf A^\top\mathbf b

Computing this, you'd find that

\mathbf x=\begin{bmatrix}a_0\\a_1\\a_2\end{bmatrix}\approx\begin{bmatrix}121.119\\-3.786\\-0.175\end{bmatrix}

which means the first choice is correct.
8 0
3 years ago
Need help solving this math question?
omeli [17]
I am so sorry but I can’t see the question because if the glare on it
4 0
3 years ago
Use the direction variation equation to solve this?
Volgvan
I have the same thing someone please help us
5 0
3 years ago
State the domain of the rational function.
Makovka662 [10]
f(x)=\dfrac{12}{13-x} is undefined where the denominator is zero. The domain is all values of x for which the function is defined.

The domain of f(x) is all real numbers except 13.
8 0
2 years ago
The sum of two numbers is 30 the difference of the two numbers is four what is the lesser number
andriy [413]

Answer:

the lesser number is 13

Step-by-step explanation:

13 + 17 = 30 and they are four apart

4 0
2 years ago
Other questions:
  • HELP HELP ASAP PLZZZZZZZZ I will make u brainliest!!!!!
    5·2 answers
  • Help pls!
    5·1 answer
  • Find the missing number. 1, 2, 6, 24, 120,?
    14·1 answer
  • .Jim opened an account with $400. The account pays three percent quarterly. How much is in the account at the end of two years?
    6·1 answer
  • Elimination method <br> 2x-7y=0<br> 4x+9y=0
    13·1 answer
  • Name the property shown. 5 × 7 = 7 × 5
    14·2 answers
  • Is it possible to use substitution to solve a system of linear equations if one equation represents a horizontal line and the ot
    10·1 answer
  • This is a picture of a cube and the net for this cube.
    11·2 answers
  • Write the log equation as an exponential equation. You do not need to solve for x.
    8·1 answer
  • A rectangle has is 70 cm long and w cm wide. The perimeter of the rectangle is 182 cm. What is the width, w?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!