Ask question

Ask question

All categories

3 years ago

8

Rosa made a mosaic wall using 42 black tiles, 35 blue tiles, and 23 red tiles. Write a percent to represent the number of red ti

les in the mural.

2 answers:

sergejj [24]3 years ago

8 0

First you have to figure out the total.
42+35+23= 100
So plug it in.
23/100
23%
Your answer is 23%.
Hope this helped ^-^

Vlada [557]3 years ago

4 0

Answer:

<h2>23%</h2>

Step-by-step explanation:

Givens:

42 black tiles.
35 blue tiles.
23 red tiles.

The percentage of the number of red tiles is obtained by dividing all red tiles with the total number of tiles, that is

$\frac{23}{42+35+23}=\frac{23}{100}= 0.23 \ (or \ 23\%)$

<em />

<em>Therefore, all red tiles in the mural represent a 23% of all tiles.</em>

You might be interested in

Marine biologists have determined that when a shark detectsthe presence of blood in the water, it will swim in the directionin w

siniylev [52]

Solution :

a). The level curves of the function :

$C(x,y) = e^{-(x^2+2y^2)/10^4}$

are actually the curves

$e^{-(x^2+2y^2)/10^4}=k$

where k is a positive constant.

The equation is equivalent to

$x^2+2y^2=K$

$\Rightarrow \frac{x^2}{(\sqrt K)^2}+\frac{y^2}{(\sqrt {K/2})^2}=1, \text{ where}\ K = -10^4 \ln k$

which is a family of ellipses.

We sketch the level curves for K =1,2,3 and 4.

If the shark always swim in the direction of maximum increase of blood concentration, its direction at any point would coincide with the gradient vector.

Then we know the shark's path is perpendicular to the level curves it intersects.

b). We have :

$\triangledown C= \frac{\partial C}{\partial x}i+\frac{\partial C}{\partial y}j$

$\Rightarrow \triangledown C =-\frac{2}{10^4}e^{-(x^2+2y^2)/10^4}(xi+2yj),$ and

$\triangledown C$ points in the direction of most rapid increase in concentration, which means $\triangledown C$ is tangent to the most rapid increase curve.

$r(t)=x(t)i+y(t)j$ is a parametrization of the most $\text{rapid increase curve}$ , then

$\frac{dx}{dt}=\frac{dx}{dt}i+\frac{dy}{dt}j$ is a tangent to the curve.

So then we have that $\frac{dr}{dt}=\lambda \triangledown C$

$\Rightarrow \frac{dx}{dt}=-\frac{2\lambda x}{10^4}e^{-(x^2+2y^2)/10^4}, \frac{dy}{dt}=-\frac{4\lambda y}{10^4}e^{-(x^2+2y^2)/10^4}$

∴ $\frac{dy}{dx}=\frac{dy/dt}{dx/dt}=\frac{2y}{x}$

Using separation of variables,

$\frac{dy}{y}=2\frac{dx}{x}$

$\int\frac{dy}{y}=2\int \frac{dx}{x}$

$\ln y=2 \ln x$

⇒ y = kx^2 for some constant k

but we know that $y(x_0)=y_0$

$\Rightarrow kx_0^2=y_0$

$\Rightarrow k =\frac{y_0}{x_0^2}$

∴ The path of the shark will follow is along the parabola

$y=\frac{y_0}{x_0^2}x^2$

$y=y_0\left(\frac{x}{x_0}\right)^2$

7 0

3 years ago

Self-fulfilling prophecy is a primary example of the capability of language to

UNO [17]

Letter A. Influence. Influence is a the primary example of he capability of language that is Self-fulling prophecy. It labels are attached to people and the words describe objects influence perception to them.

6 0

3 years ago

Read 2 more answers

What is twice the number of n and 11

saul85 [17]

Answer:

2n+22

Step-by-step explanation:

(n+11)2=

2n+22

7 0

3 years ago

−4x+60<72 or 14x+11<−31 solve for x

gulaghasi [49]

The answer to your question is x = 8

5 0

3 years ago

Read 2 more answers

Tell whether the sequence is arithmetic. If it is identify the common difference

Lisa [10]

Its arithmetic because it adds 1o each time

7 0

3 years ago