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schepotkina [342]
3 years ago
6

How do you find the sum of a geometric series?!!!

Mathematics
1 answer:
Ksivusya [100]3 years ago
6 0

Answer:

To find the sum of an infinite geometric series having ratios with an absolute value less than one, use the formula, S=a11−r , where a1 is the first term and r is the common ratio.

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PLS HELP ASAP
ale4655 [162]

Correct answer is : Area of triangle is 15\sqrt{3} sq.units

Solution:-

We can do it in 2 methods.

Method 1:-

Given that AB=6, BC=10 and m∠B = 120

Then area of triangle = \frac{1}{2}XbaseXheight

Let us assume AB is base and D is an altitude from C onto AB.

Then sin(60)= \frac{CD}{BC}

          CD = BC sin(60)

Hence height = 10*\frac{\sqrt{3}}{2} = 5\sqrt{3}

Hence area of ΔABC = \frac{1}{2} X6X5\sqrt{3} = 15\sqrt{3} sq.units

Method2:-

Area of triangle = \frac{1}{2} acsin(B)

Here a= BC=10, c=AB=6.

Hence area of triangle = \frac{1}{2}X6X10sin(120) = 15\sqrt{3} sq.units


6 0
3 years ago
What is the decimal number of 100/2​
Marina86 [1]
I think it might be 50? unless you meant 2/100, which is 0.02
4 0
3 years ago
75% of something = 342<br>Need answer quick
Ostrovityanka [42]
The answer is 456

This the answer 456
8 0
3 years ago
Can a local maximum also be a point of inflection? Explain.
myrzilka [38]
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7 0
3 years ago
Write 6 17/20 as a decimal
djverab [1.8K]

Answer:

6.85

Step-by-step explanation:

6 17/20

Convert to improper fraction.

137/20

Divide.

= 6.85

3 0
3 years ago
Read 2 more answers
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