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3 years ago

15

Ms. Johnson is drawing a floor plan of her square room that has an area of 100 ft2. She is using the scale of 0.5 inch =2 ft. Wh

at is the length of her room on the floor plan?

1 answer:

algol [13]3 years ago

3 0

Answer:

it's 2.5 inches cool profile pic to

Step-by-step explanation:

You might be interested in

Help ASAP!!!!!!!! PLEASEE

WARRIOR [948]

Her brother sent C. 490 messages.

In order to find this, we need to set it up as a proportion. Once we have done that, we can cross multiply and solve for the unknown variable.

(4/7) = (280/x) -----> Cross multiply.

4 * x = 7 * 280

4x = 1960

x = 490

6 0

3 years ago

Prove a/b is less than b/a when 0 < a <b

enyata [817]

$\frac{a}{b} < \frac{b}{a} \implies \\ a^2 < b^2 \implies a-b$

We are given that 0<a<b, which means that 0>-a>-b if you multiply it by -1, which means what's given by our inequality is true and we are done.

7 0

3 years ago

an educational psychologist wanted to know the effects of four different methods of teaching arithmetic. using 12 classrooms, ea

Leya [2.2K]

The dependent variable depends on a particular situation. The independent variable does depends on the result of an experiment. The controlled variable is a variable whose value is constant.

What is dependent variable?

The variable being measured or tested in an experiment is known as the dependent variable. The results of the participants' tests, for instance, since that is what is being measured, would be the dependent variable in a study looking at how tutoring affects test scores.

What is independent variable?

This isn't the same as an experiment's independent variable, which is a variable that can stand on its own. Tutoring would be the independent variable in the aforementioned case. The dependent variable (test results), however, may alter depending on the independent variable (tutoring).

What is controlled variable?

Anything kept constant or constrained in a research study is referred to as a control variable. Despite not being relevant to the study's objectives, this variable is controlled because it might have an impact on the results.

Numbers called parameters are used to define the characteristics of entire populations. Statistics are numerical representations of sample characteristics. One population parameter is the average income in the United States.

To learn more about variables, you visit the below site:

brainly.com/question/17344045?

#SPJ4

6 0

1 year ago

The combined height of one fir tree and one pine tree is 212121 meters. The height of 444 fir trees stacked on top of each other

inn [45]

Answer: The height of each fir tree is 9 meters, and the height of each pine tree is 12 meters.

Step-by-step explanation:

Let x= height of each fir tree, y = height of each pine tree.

As per given, we have

x+y = 21 (i)

4x=y+24 (ii)

From (ii),

$4x-y=24$ (iii)

Add (i) and (iii), we get

$5x=45\\\\\Rightarrow\ x=\dfrac{45}{5}\\\\\Rightarrow\ x=9$

Put value of x in (i), we get

$9+y=21\Rightarrow y=12$

Hence, the height of each fir tree is 9 meters, and the height of each pine tree is 12 meters.

3 0

2 years ago

Read 2 more answers

Pelase answer the question in the picture

olchik [2.2K]

Answer:

B

Step-by-step explanation:

Notice that the equation shows $KNO_3$ going from a solid to an aqueous solution, which is dissolved. Entropy is essentially when a system becomes more disordered. Whenever we go from solid to liquid to gas, that's becoming more disordered because the molecules in the system are moving much more and in more random directions.

In addition, when we dissolve solids into water, that's another increase in entropy because we technically have a liquid component here and the molecules are now breaking apart.

So, the entropy here will increase.

Hope this helps!

3 0

3 years ago