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3 years ago

Find the area of of a regular octagon with side length 20 cm.

Mathematics

1 answer:

Alla [95]3 years ago

8 0

A=2(1+ $\sqrt{2}$ )a^2=2·(1+ $\sqrt{2}$ )·20^2≈1931.37085cm²

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Two points on a line L are (5,2) and (7,-4). what is the slope of L

klemol [59]

Answer:

-3

Step-by-step explanation:

The slope of a line can be calculated with the formula (y2-y1)/(x2-x1)

In this case we have:

(-4-(2))/(7-5)

(-6)/(2)

-3

Let me know if this helps!

8 0

2 years ago

Help me with my last question plz

fomenos

Answer:

Step-by-step explanation:

Angle IHK and JKH are alternate angles.

Alternate angles are equal

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3 years ago

What is what is the anwser 34.78x0.12

maks197457 [2]

Answer: 4.1736

Step-by-step explanation:

Simply multiply 34.78 and 0.12 together.

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2 years ago

Read 2 more answers

Susan currently has an account balance of $1,336.60. Her initial deposit on the account was $820 and it earned 4.5% simple inter

emmasim [6.3K]

The correct option will be : 14 years

Explanation

Current account balance of Susan is $1,336.60 and her initial deposit was $820

So, the amount of interest earned $= 1336.60-820= 516.60$ dollar

Formula for Simple Interest is: $I= P*r*t$ , where $I$ is the amount of interest, $P$ is the initial amount, $r$ is the rate of interest in decimal and $t$ is the time duration in years.

Here, $I= 516.60, P= 820, r=4.5$ % $= 0.045$

Now according to the above formula, we will get...

$I= P*r*t\\\\ 516.60=820*0.045*t\\\\ 516.60=36.90*t\\\\ t=\frac{516.60}{36.90}= 14$

So, Susan has held the account for 14 years.

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3 years ago

What must be the value of x so that lines a and b are parallel lines cut by transversal f?

34kurt

Ah nice jajxbwkskxne

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3 years ago