3 years ago

How many distinct diagonals does an undecagon have?

Mathematics

1 answer:

Evgesh-ka [11]3 years ago

7 0

Answer:

-45

Step-by-step explanation:

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(x2+x)(x2-2x-3) is equal to?

PtichkaEL [24]

Answer:

x^4-x^3-5x^2-3x

Step-by-step explanation

Use the FOIL Method or factor.

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3 years ago

(High points) please find x and explain

MrRa [10]

Answer:

$sum \: of \: one \: exterior \: angle \: is \: \\ \\ equal \: to \: two \: opposite \: angle \: \\ \\ x + (x - 25) = 145 \\ \\x + x - 25 = 145 \\ \\ 2x - 25 = 145 \\ \\ 2x = 145 - 25 \\ \\ 2x = 120 \\ \\ x = 120 \div2 \: \\ \\ x = 70$

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3 years ago

Read 2 more answers

WILL GIVE BRAINLIES- ARITHMETIC SEQUENCE

BigorU [14]

Answer:

2,322,775

Step-by-step explanation:

$a_1=4\\\\a_i=a_{i-1}+11\\\\\implies a_2=a_{2-1}+11\\a_2= a_1+11 \\a_2= 4+11 \\a_2= 15\\\\d = a_2-a_1 \\d= 15-4 \\d= 11\\\\S_{650}=?\\\\\implies n = 650\\\\$

By the formula of sum of an Arithmetic Sequence

$S_n= \frac{n}{2} [2a_1+(n-1)d]\\\\S_{650}= \frac{650}{2} [2\times 4+(650-1)\times 11]\\\\S_{650}= 325 [8+649\times 11]\\\\S_{650}= 325 [8+7,139]\\\\S_{650}= 325\times 7,147\\\\\huge \red {\boxed {S_{650}=2,322,775}}$