3gointer77 3gointer77

01-03-2017
Mathematics

contestada

Person 1 can do a certain job in twenty-one minutes, and person 2 can do the same job in twenty-eight minutes. When completing the job together, which expression would be used to represent the amount of work done by person 1?

Respuesta :

Аноним Аноним

07-03-2017

I hope this helps you

1/21+1/28=1/t

4/84+3/84=1/t

5/84=1/t

t=84/5

84/5 1

21 ?

?.84/5=1.21

?=5/4

Answer Link

Otras preguntas

What are transparent worms that prey on other plankton?

describe two leading industries of Aguadulce and why they were important

Identify the verb (predicate) and the participle in the sentence below. Cautiously, the boys crept toward the closed door. Verb: Participle:

what is 563 rounded to the nearest tens?

to force someone to serve in the military

angelo rode his bike around a bike trail that was 1/4 of a mile long.he rode his bike around thetrail 8 times.Angelo says he rode a total of 8/4 miles .teresa

1/2 x so for some = 3/10

If a triangle has a height of 12 inches and a base of 5 inches, what is its area

Which of the following is a perfect cube? 4 8 9 12

(lc) what was the soviet Union's main goal at the Tehran Conference, held at the end of 1943