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

an art collector bought 20 paintings at an art fair, and wants to know the average price of the paintings ahe purchased at the fair. She adds the prices of all

Piper opened a savings account with $1400 that pays no interest. She deposits an additional $50 each week thereafter. How much money would Piper have in the acc

Can someone help me pls

ANSWER ASAP! In your own words name two types of acids and two types of bases. Describe how each are used.

75 POINTS AND BRAINLIEST Select the correct answers. Which TWO statements describe the changes Karen undergoes over the course of this story? (Karen is sitting

Which of the following notes is middle C? O A. 2 O B. Oc. 1 O D.

75 POINTS AND BRAINLIEST Select the correct answers. Which TWO statements describe the changes Karen undergoes over the course of this story? (Karen is sitting

carney needs $60 to buy her mother a gift. She has saved 25% of that amount so far. Bow much has she saved so far - i really need HELPPP

Pauley Company needs to determine a markup for a new product. Pauley expects to sell 25,000 units and wants target profit of $20 per unit. Additional informatio

HELLo the attachment show the question dont answer if you dont know