3 years ago

Find the measure of the arc or central angle indicated. Assume that lines which appear to be

Mathematics

1 answer:

9966 [12]3 years ago

4 0

Answer:

310°

Step-by-step explanation:

$m\overset{\frown}{DBC} = m\overset{\frown}{DB} + m\overset{\frown}{BC} = 180^\circ + 130^\circ = 310^\circ$

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Find the sum of a finite geometric sequence from n = 1 to n = 6, using the expression −2(5)n − 1.

vazorg [7]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
a_1=-2\\
r=5\\
n=6
\end{cases}
\\\\\\
S_6=-2\left( \cfrac{1-5^6}{1-5} \right)$

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3 years ago

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Finding the function of y=-2/3x +2

nordsb [41]

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Step-by-step explanation:

in standard form

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2 years ago

What is the value of x?

Licemer1 [7]

Answer:

D. 16

Step-by-step explanation:

1. Because these are vertical angles (opposite pair of angles that are formed by intersecting lines), these are congruent. That means (8x-8) = (7x+8).

2. (Solving)

Step 1: Subtract 7x from both sides.