Question

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Answer 1

For each figure, find the value of x.

x = _____°

heres the picture:
http://takeexam.next.ecollege.com/ec/pub/K12Content/Courses/resources/swfs/media/Ninth_Grade/Math/Unit6664/Lesson38095/VHS_GMT_03_10_quiz1.gif

Answer 2

I got an error message when i clicked the link...

Answer 3

\(\huge\tt \color{black}{\sum\limits_{n=1}^{100}n.2^n}\)


i need formula for this series

Answer 4

I don't understand what you need @mathmath333, could you explain? What's the question say?

Answer 5

\(\large\tt \color{black}{1.2+2.2^2+3.2^3....100.2^{100}}\)

Answer 6

It looks like you already have the formula there...so I'm confused still

Answer 7

Sorry

Answer 8

i wanted to know how u derive the formula

Answer 9

its ok

Answer 10

Oh! You want to know how they got that formula?!

Answer 11

Is that what you want?

Answer 12

yes!

Answer 13

Okay. I get it now lol

Answer 14

Okay, so that sign is called sigma notation. Does that sound familiar?

Answer 15

yes

Answer 16

are the periods supposed to be multiplication signs...?

Answer 17

or are they decimals?

Answer 18

is 1.2 supposed to mean
1.2
or 1•2?

Answer 19

\(\huge\tt \color{black}{\times}\)

Answer 20

i hope u got my question

Answer 21

Okay so the n=1 means you substitute 1 for n in the equation
\[n \times2^n\]

Answer 22

i have the formula for nth term and
i need the summation formula upto nth term for it

Answer 23

and then, to get the next number in the sequence, you plug in what you got for
\[(1) \times 2^1\] as n into the equation \[n \times 2^n\]...and so forth

Answer 24

the 100 indicates the amount of terms you are including in the summation. Does what I've said so far make sense?

Answer 25

u know formula for first n natural numbers like that i need formula for this series

i hope u understand my question

Answer 26

...like finding the nth term of a sequence?

Answer 27

no sum upto nth term of sequence

Answer 28

http://www.purplemath.com/modules/series4.htm
look at example #2

Answer 29

In triangle RST, measure of angle R = (2x + 10), measure of angle S = (2x + 25), and measure of angle T = (x - 5). Find the value of x.

Answer 30

All triangles add up to 180 degrees, so...
(2x + 10) + (2x + 25) + (x - 5) = 180

Answer 31

Combine like terms:
5x + 30 = 180
5x = 150
x = 30

Answer 32

Great thank you for explaining it!!

Answer 33

Acid or base

Answer 34

Suppose the measure of an exterior of an equiangular triangle is (x + 15). What is the value of x?

Answer 35

yw @madmanty

Answer 36

yw?

Answer 37

yw = you're welcome

Answer 38

oh haha ok

Answer 39

interior angle + exterior angle = 180 degrees
equangular triangle means all angles equal 60 degrees
so 60 + ? = 180

Answer 40

60 + (x + 15) = 180

Answer 41

x=?

Answer 42

ohhhhh ok. thanks again!! haha
x=105?

Answer 43

correct!

Answer 44

sweet!! thanks so much!

Answer 45

the compliment of an angle measures 42 degrees. what is the measure of the angle?

Answer 46

complimetnary angles add up to 90 degrees'
90 - 42 = answer

Answer 47

your a genius aha

Answer 48

What are converse statements?

Answer 49

what is the measure of angle x?

Answer 50

Converse statemtns: http://hotmath.com/hotmath_help/topics/converse-inverse-contrapositive.html

Answer 51

i figured that one out, but i need help with the last one i asked..

Answer 52

use your knowledge of exterior/interior angles and supplementary angles