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2 years ago

If f(x)= = (3+x) (x-3) what is f(a + 2)?

Mathematics

1 answer:

Butoxors [25]2 years ago

3 0

(3+a+2) (a+2-3)
(5+a) (a-1)
5a-5+a^2-a
Rearrange and combine like terms
a^2 +4a-5

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A bookshelf can hold a maximum of 45 books. Let b represents the number of books to be shelved. Which inequality represents how

leonid [27]

The number of books that can be shelved is 45. So then we know that the amount that need to be shelved can be 45, if the bookshelf had 0 books on it. This means that it can have the equal part of the inequality sign.

However, the amount of book that need to be shelved cannot exceed 45, so b must be less than 45.

Therefore, the answer must be D) b ≤ 45.

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3 years ago

A circular pizza with a diameter of 8 inches. The pizza is in a square box with side lengths of 8 inches. In square inches, how

Mumz [18]

Step-by-step explanation:

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2 years ago

Let A = {x : 2x² + 3x - 2 = 0} and B = {x : x² + 3x - 4 = 0 } find (A U B) × (A Π B)

ivann1987 [24]

Given :

A = {x: 2x² + 3x - 2 = 0 }
B = {x : x² + 3x - 4 = 0 }

To find :

(A U B ) × (A Π B )

Solution :-

The first set is ,

A ={x : 2x² + 3x - 2 = 0}

Solving the Quadratic equation ,

2x² + 3x - 2 = 0
2x² + 4x - x - 2 = 0
2x( x + 2) -1( x + 2 ) = 0
(2x -1) ( x + 2) = 0
x = 0.5 , -2

Hence ,

A ={0.5, -2}

The second set is ,

B ={ x :x² + 3x - 4 = 0 }

Solving the Quadratic equation ,

x² + 3x - 4 = 0
x² + 4x - x - 4 = 0
x( x + 4)-1 ( x +4) = 0
(x + 4) ( x -1) = 0
x = 1 , -4

Hence ,

B ={1,4}

Now ,

A U B = { 0.5 , 1 , 4 , -2}
A Π B = {∅ }

Since AΠ B is a null set , hence ,

A × B = {∅}

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2 years ago

A restaurant bill is 56.39.Estimate a 15% tip

hjlf

15% would be 8.4585

hope this helps!!

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3 years ago

Kyle asks his friend Jane to guess his age and his grandmother’s age. Kyle says his grandmother is not more than 80 years old. H

Whitepunk [10]

I would say it would look something like this: 3k - 3 = g? That would be my best guess. I hope I helped & I'm so sorry if I'm wrong!

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3 years ago

Read 2 more answers