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3 years ago

Which property may be necessary during the process of solving equations with parentheses? Select all that apply

Mathematics

2 answers:

Alinara [238K]3 years ago

4 0

Reflexive, multiplication and distributive. Hope that helps! :)

Olenka [21]3 years ago

4 0

Answer:

addition property of equality

multiplication property of equality

distributive property.

Step-by-step explanation:

We use addition property of equality , multiplication property of equality and distributive property.

We will not use reflexive property which is x = x.

Let me show you an example.

solve the following equation:

2(x - 1) = 8

Use distributive property a(b - c) = a.b - a.c

2x - 2 = 8

Add 2 on both sides. Addition property of equality.

2x -2 + 2 = 8 + 2

2x = 10

Now multiply both sides by the reciprocal of 2, which is 1 over 2, we get

x = 5

Therefore, the answer is " addition property of equality , multiplication property of equality and distributive property."

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Eman is planning to sell wind chimes at a craft fair. The cost of her tools for building the wind chimes is 130. The cost of mat

antoniya [11.8K]

We are given : The cost of tools for building wind chimes = $130.

Cost of material for each wind chime = $10.

We need to find the total cost of making 100 wind chimes.

Please note : $130 is the fix cost and $10 is the variable cost of each wind chime.

<em>In order to find the cost of 100 wind chimes, we need to multiply 100 by cost of making one wind chime and add the fix cost for tools for building wind chimes.</em>

Therefore, total cost of making 100 wind chimes = 10×100 + 130

= 1000+130

=1130.

<h3>Therefore, the total cost to make 100 wind chimes is $1130.</h3>

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3 years ago

PLEASE HELP!! DUE SOON :( #40

Allisa [31]

Answer:

Types of polygon

Polygons can be regular or irregular. If the angles are all equal and all the sides are equal length it is a regular polygon.

Regular and irregular polygons

Interior angles of polygons

To find the sum of interior angles in a polygon divide the polygon into triangles.

Irregular pentagons

The sum of interior angles in a triangle is 180°. To find the sum of interior angles of a polygon, multiply the number of triangles in the polygon by 180°.

Example

Calculate the sum of interior angles in a pentagon.

A pentagon contains 3 triangles. The sum of the interior angles is:

180 * 3 = 540

The number of triangles in each polygon is two less than the number of sides.

The formula for calculating the sum of interior angles is:

(n - 2) * 180 (where n is the number of sides)

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2 years ago

What is 0.03 out of 1 as a percent?

BigorU [14]

When trying to find a percent, it is best to multiply everything by 100 (as a percentage is out of 100). 0.03*100= 3 and 1*100=100. Therefore, 0.03 as a percent is 3% Hope this helps :)

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