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3 years ago

Geometry math question

Mathematics

1 answer:

djyliett [7]3 years ago

6 0

If the interior angle of a regular polygon is 160 degrees, then the exterior angle is 20 degrees. The sum of all exterior angles is 360 degrees so there must be:

360/20 sides = 18 sides

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Describe how to solve 4x = 36.

netineya [11]

Answer:

hope this helps! :)

Step-by-step explanation:

4x=36

divide both sides of the equation by 4

4x / 4 = 36 / 4

Any expression divided by itself equals 1

x= 36 / 4

Calculate the quotient

36/4 = 9

x=9

4 0

3 years ago

Write the equation in point-slope form of the line that contains the points (3,-5) and (5,- 1)

SCORPION-xisa [38]

Answer:

y+5=2(x-3)

Step-by-step explanation:

y-y1=m(x-x1)

6 0

3 years ago

Please help me ! Which one is it? (9Ft IS WRONG)

9966 [12]

Here’s the correct answer and the way i got to it. Hope this helps :)

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3 years ago

4400 dollars is placed in an account with an annual interest rate of 7.5%. To the nearest tenth of a year, how long will it take

Katarina [22]

Answer:

Step-by-step explanation:

The equation for the amount of money in an account after a certain amount is deposited and compounded after t years once per year is

$A(t)=P(1+r)^t$

Our A(t) = 33800, P = 4400, r = .075 and we are looking for t. Filling in:

$33800=4400(1+.075)^t$ and

$33800=4400(1.075)^t$

Begin by dividing both sides by 4400 to get

$7.681818182=1.075^t$

The only way to move that t our from its current position as an exponent is to take the natural log of both sides and follow the rules for natural logs:

$ln(7.6181818182=ln(1.075)^t$