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

I need three duties for the chief of state for notes

Prompt: What types of things do you do at your house? Use the -ir verbs that you've learned to describe the activities you, your family, and your friends do at

what was the difference between the virgina and the new jersey plan concerning legislature

What is the solution to 4x+6is less than or equal to18

"if you exceed your aerobic capacity during a workout, your muscle cells will __________."

How could billion Jennings Bryan to post the gold standard and support bimetallism?

I think it is agreed by all parties, that this prodigious number of children in the arms, or on the backs, or at the heels of their mothers, and frequently of t

uppose the sales tax rate in a certain state is 8% of the purchase price. If a new food processor sells for $750, how much is the sales tax?

Decide what the best solution would be if you reach your lab table and find a broken beaker with liquid spilling out. clean up the mess tell your lab partner s

a baseball diamond is square with each base 90 feet apart, Andy is starting on first base while his teammate Logan is standing between 2nd and 3rd base. if the