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

The length of a rectangle is 4yd longer than its width. If the perimeter of the rectangle is 36yd, find its area

How many community lifelines are there? A. 3 B. 9 C. 7 D. 5

please answer 4 questions ASAP

Please help me with this question

what is the difference between in time and on time?

9/10 of the weight of a loaf of bread comes from the flour used in its baking. 2/9 of the weight is the protein what fraction of the weight is protein?

using appropriate properties find-5/6 x 5/7 - 1/2 x 4/5 - 1/12 x 5/7 part of the chapter rational numbers pls answer quickly as i need it today thanks. tia

help asap plss giving branlist!!

change in to passive the mail-order company sent mrs.green a parcel.

no me da el pastel de chocolate!