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AlladinOne [14]
3 years ago
14

Multiply. (3x + 2)(3x - 2) A. x² + 12x- 4 B. 9x² – 12x - 4 c. 9x - 4 D. 9x² + 4

Mathematics
1 answer:
Artemon [7]3 years ago
5 0

Answer: 9x²-4

Step-by-step explanation:

To solve use the formula (known as the difference of squares) a²-b²=(a+b)(a-b) and substitute a with 3x and b with 2 and then substitute to find: (3x)²-2²= 9x²-4

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Answer:

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There are many different ways to go about proving something, we'll discuss 3 methods: direct proof, proof by contradiction, proof by induction. We'll talk about what each of these proofs are, when and how they're used. Before diving in, we'll need to explain some terminology.

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3 0
3 years ago
50,60,72 find the 8th term airthmetic and geometric sequence
Savatey [412]

Answer:

8th term is 179.15904

Step-by-step explanation:

The sequence is geometric with a common ration = 6/5

r = 60/50 = 72/60 = 6/5

Use the formula

a_{n} = ar^{n - 1}

In your case a = 50, r = 6/5 and n = 8

a_{8} = 50(6/5)^{8 - 1} \\          = 50(6/5)^{7} \\          =  50(279936/78125)\\          =   179.15904

4 0
3 years ago
Tina covers the floor of a room with carpeting. She uses carpet squares that measure one foot on each side. How many carpet squa
gizmo_the_mogwai [7]

Answer:

She need <u>96 square feet</u> carpet to cover the room.

Step-by-step explanation:

Given:

Tina covers the floor of a room with carpeting. She uses carpet squares that measure one foot on each side.

Now, to find carpet squares does she need to cover a room that 8 feet wide by 12 feet long.

So, the dimensions of room are:

Length = 12 feet.

Width = 8 feet.

Now, getting the area by putting formula:

<u><em>Area of room = Length × width</em></u>

Area\ of\ room = 12\times 8

Area\ of\ room=96\ square\ feet.

Therefore, she need 96 square feet carpet to cover the room.

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2 years ago
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Svetlanka [38]

Answer:

Option A is correct .

Step-by-step explanation:

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3 years ago
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Answer:

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