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ad-work [718]
2 years ago
13

If the area of an equilateral triangle is 9root3 cm square find its side​

Mathematics
1 answer:
kobusy [5.1K]2 years ago
7 0

Answer:

6 cms.

Step-by-step explanation:

If the side of an equilateral triangle is 2x cm then its height is  √3x and its base is 2x.

Area = 1/2 * base * height

9√3 = 1/2 * 2x * √3x    

9√3 = x * √3x

9 = x^2

x = 3

So length of each side = 2*3 = 6.

x = 9

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Simplify.
Kazeer [188]
(1/2)^2 = 1/4
2-2/3 = 6/3 - 2/3 = 4/3

OK so:
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= 1/4 - 8
= 1/4 - 32/4
= -31/4
3 0
3 years ago
Given a line passes through point (5,8) and the origin, find the equation of the line.<br> y=
SOVA2 [1]

Answer:

y = 8/5x

Step-by-step explanation:

I'm assuming that they're asking for the equation in point-slope form.

The formula is y=mx+b where:

m = slope

b = y intercept

However, the y intercept is just (0,0) so b = 0

To find the slope we already have 2 given points: (0,0) and (5,8)

To find slope you do rise/run and you get 8/5

Substitute the slope & y intercept in the formula:

y = 8/5x

Let me know if I'm wrong!!

6 0
2 years ago
Read 2 more answers
What is the equation of the line that passes through (0, -2) and has a slope of 0?
11Alexandr11 [23.1K]

Answer:

y = -2

Step-by-step explanation:

The horizontal line through this point has a slop of 0

8 0
2 years ago
Tina and three of her friends are in line with different amounts of money. The first person in line had $775. If the amount trip
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37,975 dollars altogher
4 0
3 years ago
Question 5: How long will it take for 2 g of a sample of iodine-131, which has a half-life of about 8 days, to decay to 0.04 g?
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This problem can be represented through the following equation

A = A₀(1/2)^t/h

where

A----------->  is the amount of substance left after time t

A₀ ----------> is the original amount---------> 2 g

h------------->  is the half-life-----------> 8 days

for A=0.04 g

t=?

0.04 = 2(1/2)^t/8

0.02 = (1/2)^t/8

Take ln on both sides:

ln(0.02) = ln [(1/2)^t/8]

ln(0.02) = (t/8)(ln 1/2)

t = 8*ln(0.02)/ln(1/2)

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the answer is 45.15 days

4 0
3 years ago
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