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3 years ago

Arrange 7 people into group(s) such that a group must have at least 3 people?

Mathematics

2 answers:

alina1380 [7]3 years ago

6 0

A group of 3️⃣
&
A group of 4️⃣

sukhopar [10]3 years ago

5 0

7 people can be divided into 2 groups, the first group having 4 people; and the second group having 3 people.

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They got a deal for tables and chairs in the shop. 45 tables cost 500 dollars. The deal gave them this same rate on chairs with

Alex Ar [27]

Answer:

$67

Step-by-step explanation:

45/500=×/750

x=67.50

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3 years ago

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A child builds two wooden train sets. The path of one of the trains can be represented by the function y = 2cos2x, where y repre

Svet_ta [14]

Using a trigonometric equation, it is found that it will take 2.28 minutes until the two trains are first equidistant from the child.

<h3>What is the distance of each train to the child?</h3>

The distance of the first train is:

$y_1 = 2\cos^{2}x$

The distance of the second train is:

$y_2 = 3 + \cos{x}$

<h3>When are the trains equidistant to the child?</h3>

When $y_1 = y_2$ , hence:

$2\cos^{2}x = 3 + \cos{x}$

The following substitution is made:

$z = \cos{x}$

Hence:

$2z^2 = 3 + z$

$2z^2 - z - 3 = 0$

Which is a quadratic equation with coefficients $a = 2, b = -1, c = -3$ , hence:

$\Delta = b^2 - 4ac = (-1)^2 - 4(1)(-3) = 13$

$z_1 = \frac{-b + \sqrt{\Delta}}{2a} = \frac{1 + \sqrt{13}}{4} = 1.5$

$z_2 = \frac{-b - \sqrt{\Delta}}{2a} = \frac{1 - \sqrt{13}}{4} = -0.65$

Then, applying the trigonometric equation, considering that $-1 \leq z \leq 1$ due to the range of the cosine function:

$z_2 = \cos{x_2}$

$x_2 = \arccos{z_2} = \arccos{-0.65} = 2.28$

It will take 2.28 minutes until the two trains are first equidistant from the child.

You can learn more about trigonometric equations at brainly.com/question/2088730

8 0

3 years ago

How do I get the answer for this?

Rzqust [24]

1. Given: Note that on the top, it is shown right next to "given"

2. Vertical angles theorem: Angles vertically opposite of each other are congruent

3. Transitive Property: If ∠3 ≅ ∠2 (Given), and ∠2 ≅ ∠6, then ∠3 ≅ ∠6

hope this helps

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3 years ago

A polygon is 283 in it means ?

laila [671]

Answer:

The polygons area is 283 in2

Step-by-step explanation:

lamo why u doin work on the weekend you should go nd enjoy it!

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3 years ago

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I'll give you brainliest if you answer! All I need is help with number 15!

Sergio039 [100]

Answer:

120 minutes

Step-by-step explanation:

The lowest number that all three trains times can evenly go into is 120. 60 is not divisible by 8, but 120 is. So is 12 and 10, so 120.

6 0

4 years ago