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3 years ago

How do I find the area of an octagon which has 7m on each side and the height is 8.8m

Mathematics

1 answer:

Naddika [18.5K]3 years ago

5 0

Answer:

236.59

Step-by-step explanation:

The formula 2(1+ $\sqrt{2}$ ) $l^{2}$ can be used. Substitute the length of one side into the equation and solve.

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(3x + 1) (2x + 5x – 7)<br> Multiply

Valentin [98]

Answer:

21^2 − 14 − 7

Step-by-step explanation:

(3+1)(2+5−7)

(3x+1)({\color{#c92786}{2x}}+{\color{#c92786}{5x}}-7)

(3x+1)(2x+5x−7)

(3+1)(7−7)

(3x+1)({\color{#c92786}{7x}}-7)

(3x+1)(7x−7)

Distribute

again

Multiply by 1

Combine like terms

Solution

21^2 − 14 − 7

7 0

3 years ago

What is the power of 3⁰?

antoniya [11.8K]

ANSWER

EXPLANATION

We want to find the value of:

$3^0$

One of the rules of Indices, called the Power with Exponent Zero rule, states that any number raised to the power of zero is equal to 1.

This means that:

$3^0\text{ = 1}$

That is the answer.

7 0

1 year ago

Help me please!

telo118 [61]

Answer:

$f^{-1}(6) = 50$

Step-by-step explanation:

Given

$f(x) = \sqrt{2x} - 4$

Required

Find $f^{-1}(6)$

First, we calculate the inverse function

$f(x) = \sqrt{2x} - 4$

Express f(x) as y

$y = \sqrt{2x} - 4$

Swap the positions of x and y

$x = \sqrt{2y} - 4$

Solve for y: Add 4 to both sides

$4 + x = \sqrt{2y} - 4+4$

$4 + x = \sqrt{2y}$

Square both sides

$(4 + x)^2 = 2y$

Divide both sides by 2

$y = \frac{(4 + x)^2}{2}$

Express y as an inverse function

$f^{-1}(x) = \frac{(4 + x)^2}{2}$

Next, solve for: $f^{-1}(6)$

Substitute 6 for x

$f^{-1}(6) = \frac{(4 + 6)^2}{2}$

$f^{-1}(6) = \frac{(10)^2}{2}$

$f^{-1}(6) = \frac{100}{2}$

$f^{-1}(6) = 50$

7 0

3 years ago

Write (4,-1), with a slope of -3 in point-slope form.

yawa3891 [41]

Answer:

y+1=-3(x-4)

Step-by-step explanation:

first you want to plug in the numbers into the formula which y-y1=m(x-x1).

then you get y+1=-3(x-4)

5 0

3 years ago

What are some examples of a linear system

Zina [86]

Answer:

Describe the middle class of Central America. Mention jobs, homes, and education.ury

Step-by-step explanation:

8 0

2 years ago