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2 years ago

10

PLEASE HELP! I CANT GET A BAD GRADE!

1 answer:

Alekssandra [29.7K]2 years ago

5 0

Answer:

It is decreased by 3.25

Step-by-step explanation:

When you add all 8 numbers you'll get 58 then you divide them by 8 you will get 7.25 which is the mean. To find out what is the decrease we need to take out the 30 and add all the other numbers and we get 28. After that you divide 28 by 7 and you get 4. Subtract 4 from 7.25 and you get 3.25.

2+2+2+3+5+6+8+30=58

58/8=7.25

2+2+2+3+5+6+8=28

28/7 = 4

7.25-4=3.25

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2 years ago

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3 years ago

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3 years ago

6 Which expression is equivalent to 2x2 + 7x +4?

dlinn [17]

Option J is correct.

Step-by-step explanation:

We need to find the expression equivalent to $2x^2 + 7x +4$

Finding the equivalent expression:

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We check all the expressions given:

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Multiplying both terms:

$2x(x+4)-1(x+4)\\=2x^2+8x-x-4\\=2x^2+7x-4$

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Option G: (2x+1)(x-4)

Multiplying both terms:

$2x(x-4)+1(x-4)\\=2x^2-8x+x-4\\=2x^2-7x-4$

This expression is not equivalent to $2x^2 + 7x +4$ , So, Option G is incorrect.

Option H: (2x+1)(x+4)

Multiplying both terms:

$2x(x+4)+1(x+4)\\=2x^2+8x+x+4\\=2x^2+9x+4$

This expression is not equivalent to $2x^2 + 7x +4$ , So, Option H is incorrect.

Option J: None of these

So, Option J is correct.

Keywords: Solving Quadratic Equation

Learn more about Solving Quadratic Equation at:

#learnwithBrainly

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3 years ago