Ka8kninniemartus2a Ka8kninniemartus2a

02-08-2016
Mathematics

contestada

mary and her brother john collect foreign coins. mary has 3 times the number of coins that john has. together they have 180 foreign coins. find how many coins mary has.

Respuesta :

apologiabiology apologiabiology

02-08-2016

total is 180
m+j=180

m has 3 times j
m=3j

sub 3j for m
3j+j=180
4j=180
divide both sides by 4
j=45
sub
m=3j
m=3(45)
m=135

mary has 135 coins

Answer Link

Otras preguntas

What percent of 1340 is 13.4

how are the ice ages related to geography

what effect does observing a substances physical properties have on the substance

What should you keep in mind when bidding on items at an online flower auction? A. The product is almost never guaranteed. B. There are no tools or ratings av

Of these four words, which one is most likely to have a negative flavor? A. Distract B. Harangue C. Meander D. Confound

If 60% of a number is 18 what is 90% of the number

In "Waiting," what mood is created by the depiction of life during winter? A. joyousness B. chaos C. grief D. seriousness

In F. Scott Fitzgerald's “Winter Dreams,” which type of character is Judy Jones?

Read these lines from a business letter: Since I will be in your neighborhood this weekend, I would like to meet you to discuss the new models of food process

chef alonso wants each serving of the dish to include 1/2 pound of chicken. how many 1/2 pound servongs does this recipe make?