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4 years ago

Find the product........................................

Mathematics

1 answer:

Verdich [7]4 years ago

8 0

For this case we must find the product of $(2x + 3) (2x-3)$ , for this, we must apply the distributive property, which by definition establishes that:

$(a + b) (c + d) = ac + ad + bc + bd$

So:

$(2x + 3) (2x-3) = (2x) ^ 2 + (2x) (- 3) + (3) (2x) + (3) (- 3)$

considering that $+ * - = -$

$(2x + 3) (2x-3) = 4x ^ 2-6x + 6x-9\\(2x + 3) (2x-3) = 4x ^ 2-9$

Answer:

Option A

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4 years ago

Gigi gets manicures that cost $25 each. Gigi wants to spend no more than $100 on manicures. Which of the following could be used

Ronch [10]

The correct answer is D:)

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3 years ago

Find the volume of a cone with a height of 11 cm and a base radius of 6 cm. Use the value 3.14 for n, and do not do rounding. Be

mrs_skeptik [129]

Given:

The cone with radius 6 cm and height 11cm.

Required:

Find the volume of a cone.

Explanation:

The formula for volume of cone:

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We have radius = 6 cm and height = 11 cm.

So,

$\begin{gathered} V=\frac{1}{3}\times3.14\times6^2\times11 \\ V=414.48cm^3 \end{gathered}$

Answer:

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1 year ago

evelyn drinks 8 glasses of water a day which is 56 glasses a week how many galles of water does she drink in a year 1 year=56 we

Phantasy [73]

Answer:

3,136 glasses each year.

Step-by-step explanation:

If one year = 56 weeks and 8 glasses a day = 56 glasses a week then,

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3 years ago

The lengths of three

True [87]

Answer:

90 cm, 180 cm, 240 cm

Step-by-step explanation:

Let the lengths of sides of the triangle be 3x, 6x and 8x

$\therefore \: 3x + 6x + 8x = 5.1 \: m \\ \therefore \: 17x = 510 \: cm \\ \therefore \: x = \frac{510}{17} \\ \therefore \:x = 30 \: cm \\ \implies \\ 3x = 3 \times 30 = 90 \: cm \\ 6x = 6 \times 30 = 180 \: cm \\ 8x = 8 \times 30 = 240 \: cm$

Hence, lengths of the sides of the triangle are 90 cm, 180 cm and 240 cm.

4 0

3 years ago