Seudónimo Seudónimo

31-12-2016
Mathematics

contestada

If the mean (average) of five consecutive numbers is 21, the smallest of three five numbers will be...

Respuesta :

apologiabiology apologiabiology

31-12-2016

consecutive numbers are 1 apart
they are
x,x+1,x+2,x+3,x+4

average is 21
(x+x+1+x+2+x+3+x+4)/5=21
(5x+10)/5=21
times both sides by 5
5x+10=105
minus 10 both sides
5x=95
divide both sides by 5
x=19
x+1=20
x+2=21
x+3=22
x+4=23

the smallest number is 19

Answer Link

Otras preguntas

Who is credited with leading the crusade to establish Thanksgiving day

Hershey and Chase used _______ to prove DNA was the carrier of inherited material. a. radioactive isotopes b. enzymes c. nucleic acids d. none of the above

tim says -40°f is equal to -40°c. explain why this is true.

A class has 6 boys and 14 girls. What is the ratio in simplest form that compares number of boys to total number of students?

Which statements about the English colonies in North America are true? Choose all answers that are correct. A. Many laborers on the plantations of Virginia were

what was not true about the korean war?

I need help on geometry proofs

Mark the statement if it is accurate about the Glorious Revolution. A. Protestant leaders were upset with James II for appointing Catholics to high positions in

Jackson was making a poster for his room. He arranged 50 trading cards in the shape of a rectangle on the poster. How many rows of cards were on his poster?

Which is found in the Declaration of Independence? A. "God save the king." B. "These are the times that try men's souls." C. "…the right to bear arms..." D. "..