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katrin [286]
3 years ago
5

Which notation is incorrect notation for the blue angle?

Mathematics
2 answers:
Crank3 years ago
5 0
The answer is choice D) Angle F

Why is this not proper notation? Because there are two possible angles with point F as the vertex. If we only had triangle DFG to worry about, then we can say "angle F" without mentioning other points, and we'd know exactly what angle is being referenced. In this case, angle F could refer to either angle DFG or angle DFE. Note how F is the middle letter in each case. 
BartSMP [9]3 years ago
4 0
The fourth answer should be correct
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Find the 12th term of the following geometric sequence.<br> 10, 30, 90, 270,
DanielleElmas [232]

Answer:

<h3>The 12th term is 1771470</h3>

Step-by-step explanation:

Since the above sequence is a geometric sequence

An nth term of a geometric sequence is given by

A(n) = a(r)^{n - 1}

where a is the first term

r is the common ratio

n is the number of terms

From the question

a = 10

To find the common ratio divide the previous term by the next term

That's

r = 30/10 = 3 or 90/30 = 3 or 270/90 = 3

Since we are finding the 12th term

n = 12

So the 12th term is

A(12) = 10( {3})^{12 - 1}

A(12) = 10 ({3})^{11}

<h3>A(12) = 1771470</h3>

Hope this helps you

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liubo4ka [24]
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