All categories

2 years ago

Circle groups to show 3x(2x3)

Mathematics

2 answers:

docker41 [41]2 years ago

5 0

2x3=6x3=18 u always do PEMDAS,

saveliy_v [14]2 years ago

3 0

Answer:

This problem is asking for a graphic solution, which is attached.

We just need to make groups, first to express 2x3. we make two groups with three elements each, then, we graph three groups exactly equal.

At the end, we must have three groups and each of them must have two groups with three elements. If we count all elements, we will have 18.

You might be interested in

Plato explains that we know geometry by _________.

sasho [114]

Plato explains that we know geometry by our gain knowledge through recollection. Our soul is what recollects this place hence we came where there exist unchanging truths. Delivered the theory of Forms, according to which the world people know by means of the senses is just an imitation of the eternal, pure, eternal, and fixed world of the Forms.

7 0

1 year ago

According to the graph of H(w) below, the w-axis is also the _____ for H(w).

klemol [59]

Independent variable. It is also called abscissa.

4 0

1 year ago

Read 2 more answers

Hikers came across a part of a redwood stump. If the length of the chord is 8 feet, what was the diameter of the tree?

erastova [34]

So in the problem, the length of the chord there is the circumference of the tree. So in order to get the diameter of the tree, we must use the formula in getting the circumference of a circle that is stated as follows.

C = 2pi *Radius

so first we need the get the radius of the tree which represent by this formula:

Radius = C /2pi = 8/6.2832 = 1.2732 ft
Diameter = 2*radius = 2 * 1.27 32 = 2.5465 feet

In summary, the diameter of the tree is 2.565 feet.

7 0

1 year ago

The length of the shadow of a pole on level ground increases by 90m when the angle of elevation of the sun changes from 58° to 3

viva [34]

Answer:

119.45 m

Step-by-step explanation:

Given:

When angle of elevation of the sun changes from 58° to 36° the length of shadow of a pole increases by 90 m.

To find:

Length of pole = ?

Solution:

Kindly refer to the attached image.

$\triangle ABC$ represents the 1st angle of elevation of sun i.e. 58°

$\triangle ABD$ represents the 2nd angle of elevation of sun i.e. 36°

Change in shadow is represented by CD = 90 m

Let height of pole, AB = $h$ m

Let side BC = $x$ m

Now, let us apply tangent rules in $\triangle ABC, \triangle ABD$ one by one:

$tan\theta = \dfrac{Perpendicular}{Base}\\\Rightarrow tan58^\circ=\dfrac{AB}{BC}\\\Rightarrow tan58^\circ=\dfrac{h}{x}\\\Rightarrow x = 0.624h ..... (1)$

$tan36^\circ = \dfrac{h}{x+90}$

Putting value of $x$ using equation (1):

$tan36^\circ = \dfrac{h}{0.624h+90}\\\Rightarrow 0.726\times 0.624h+0.726\times 90 = h\\\Rightarrow h-0.453h =65.34\\\Rightarrow \bold{h = 119.45\ m}$

119.45 m is the height of pole.

7 0

2 years ago

When we use a confidence interval to reach a conclusion about the population mean, we are applying a type of reasoning or logic

andriy [413]

Answer:

Statistical inference

Step-by-step explanation:

The confidence interval is used to give a range of values for a target population while applying the law of probability. Inferential statistics makes use of data obtained from a given population to predict and make a conclusion on a study.

Statistical inference is the process of applying the tools for inferential statistics to analyze data gotten from a given fraction of the population. This process is based on probability and random sampling.

When a confidence interval is used to conclude a population study, it is certainly based on probability. Therefore the correct option is statistical inference.

3 0

1 year ago