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3 years ago

A regular polyhedron has 8 vertices and 12 edges how many faces does it have?

Mathematics

1 answer:

Vedmedyk [2.9K]3 years ago

6 0

It has 6 faces.hopefully it helps/

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Find the value of the variable y, where the sum of the fractions 6/(y+1) and y/(y-2) is equal to their product.

Blizzard [7]

Answer:

The answer is

$y = 3$

$y = - 4$

Step-by-step explanation:

We must find a solution where

$\frac{6}{y + 1} + \frac{y}{y - 2} = \frac{6}{y + 1} \times \frac{y}{y - 2}$

Consider the Left Side:

First, to add fraction multiply each fraction on the left by it corresponding denomiator and we should get

$\frac{6}{y + 1} \times \frac{y - 2}{y - 2} + \frac{y}{y - 2} \times \frac{y + 1}{y + 1}$

Which equals

$\frac{6y - 12}{(y -2) (y + 1)} + \frac{ {y}^{2} + y }{(y - 2)(y + 1)}$

Add the fractions

$\frac{y {}^{2} + 7y - 12 }{(y - 2)(y + 1)} = \frac{6}{y + 1} \times \frac{y}{y - 2}$

Simplify the right side by multiplying the fraction

$\frac{6y}{(y + 1)(y + 2)}$

Set both fractions equal to each other

$\frac{6y}{(y + 1)(y - 2)} = \frac{ {y}^{2} + 7y - 12}{(y + 1)(y - 2)}$

Since the denomiator are equal, we must set the numerator equal to each other

$6y = {y}^{2} + 7y - 12$

$= {y}^{2} + y - 12$

$(y + 4)(y - 3)$

$y = - 4$

$y = 3$

6 0

3 years ago

Read 2 more answers

A used automobile dealership recently reduced the price of a used compact car by 10%. If the price of the car before discount w

kati45 [8]

Answer:

Step-by-step explanation:

Your answer

New price = 16290

Discount = 1810

Mark it as Brainlist. Follow me for more answer.

7 0

3 years ago

What best explains what determines whether a number is irrational?

cestrela7 [59]

An irrational<span> number is a number that cannot be exactly expressed as a ratio of two integers. Hope this helps!</span>

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3 years ago

Madison wants to buy a new lunch box. One measure 20cm x 18cm x 9cm. Another one measures 18cm x 18cm x 10cm. Which would hold m

Fiesta28 [93]

Answer:

Neither, they both carry the same amount.

Step-by-step explanation:

We can solve this from just comparing the volumes of both boxes.

20 x 18 x 9 = 3240

18 x 18 x 10 = 3240

Both have the same volume, so they could carry the same amount.

Hope this helped! :)

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3 years ago

HEY CAN ANYONE PLS ANSWER DIS MATH QUESTION!!!!!!!!

Leviafan [203]

It is a function.

The x values do not repeat.

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3 years ago

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