cadieux
cadieux
15-11-2014
Mathematics
contestada
What is the sum of the two digit multiples of 11?
Respuesta :
superkoopasirf
superkoopasirf
15-11-2014
[tex]S = \frac{1}{2}n(a + l)[/tex]
[tex]a = 11[/tex]
[tex]l = 99[/tex]
[tex]n = 9[/tex]
[tex]S = \frac{1}{2}9(11 + 99)[/tex]
[tex]S = \frac{1}{2}9(110)[/tex]
[tex]S = \frac{990}{2}[/tex]
[tex]S = 495[/tex]
Answer Link
awesome099
awesome099
15-11-2014
11+22+33+44+55+66+77+88+99
33+77+121+165+99
110+286+99
396+99
495
Answer Link
VER TODAS LAS RESPUESTAS ( 52+ )
Otras preguntas
Artificial Selection is a form of selection in which humans actively choose which traits should be passed onto offspring. Humans have used selective breeding lo
What is the term used to describe a person who served ruler or prince
Quentin tried to transform triangle GFH according to the rule (x,y) (y,x). Which best describes his attempt
It is always important to consider safety as you are conducting a science investigation. What are three common safety precautions you should use during an inves
there are 40 students in the gym. 45% of them are boys. how many are boys.
John tries to get Sara's attention, but hasn’t succeeded yet. Tries is underlined Choose the word or group of words that BEST replaces the underlin
As of 2006 how many countries have benefited from the peace corps?
What does the graph tell us about the humidity in any given location on Earth? A) The warmer the air temperature, the greater the humidity. B) The warmer the t
What is the area of a square computer screen with 21 inch sides?
What was the industrial revolution where and why did it begin?
