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4 years ago

12:35 on Sunday.

Mathematics

2 answers:

Fudgin [204]4 years ago

8 0

Answer:

Symbols with symmetry

B, C, D, G, I, L

Symbols with reflectional symmetry

B, C, G, I, L

STatiana [176]4 years ago

4 0

Answer:

see below

and see attached

Step-by-step explanation:

1. letter of the symbols have Reflectional symmetry.

A, B, C, G, I, L

2. letter of the symbols have symmetry by Translation.

A, B, C, D, E, F, G, H, I, J, K, L

3. letter of the symbols have Rotational symmetry.

C, D, L

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A regular heptagon has a perimeter of 560 centimeters. What is the length of the sides of the heptagon? 56 cm

Reika [66]

Hello!

A heptagon has 7 sides

You divide the perimeter by the amount of sides

560 / 7 = 80

Each side is 80 centimeters

The answer is 80cm

Hope this helps!

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3 years ago

9w = -54 what does w =

shepuryov [24]

Answer:

w = -6

Step-by-step explanation:

$9w=-54~(Given)\\\\\frac{9w}{9}=\frac{-54}{9}~(Divide~9~on~both~sides)\\\\w=-6~(Simplify)$

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3 years ago

Convert the angle 2π/3 radians to degrees.

11111nata11111 [884]

Answer:

2π/3 radians is equal to 120°.

Step-by-step explanation:

In this problem, we need to convert the angle 2π/3 radians to degrees.

The relation radian and degree is given by :

$D=\dfrac{180}{\pi}\times R$

Substitute all the values,

$D=\dfrac{180}{\pi}\times \dfrac{2\pi }{3}\\\\D=120^{\circ}$

So, 2π/3 radians is equal to 120°.

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3 years ago

X^2-5x-8=0 find the roots (zeros)

melomori [17]

Answer:

$x_1=\dfrac{5-\sqrt{57}}{2}\ ,\quad x_2=\dfrac{5+\sqrt{57}}{2}$

Step-by-step explanation:

$x^2-5x-8=0\\\\a=1\,,\ b=-5\,,\ c=-8\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\x=\dfrac{-(-5)\pm\sqrt{(-5)^2-4\cdot1\cdot(-8)}}{2\cdot1}=\dfrac{5\pm\sqrt{25+32}}{2}=\dfrac{5\pm\sqrt{57}}{2}$

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4 years ago

9 Find the sum of (x + 5), (-4x – 2), and (2x – 1).

s344n2d4d5 [400]

Answer: -x + 2

Step-by-step explanation:

So I assume that the question would be set up like this if you are finding the sum of all 3 terms:

(x + 5) + (-4x - 2) + (2x - 1)

1) Take out parentheses

x + 5 - 4x - 2 + 2x - 1

2) Add like terms

For the x terms:

x - 4x = -3x

-3x + 2x = -x

For the other terms:

5 - 2 = 3

3 - 1 = 2

The sum of the terms is -x + 2

7 0

3 years ago