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

why is it important to elevate the anthers

Which organization provides assistance to mothers and children living in poverty? WHO UNICEF World Bank Security Council

How does the poet use the recurring image of dead leaves on the ground in "Spring and Fall"? A. as alliteration that supports the poem's mood B. as a simile th

the problem say what is the volume (in kL) of 3.7505 x 10^4 mg of iron? Iron has a density of 7.87 g/ml. Use correct significant figures

John is 6 years older than Kathy. Together their ages equal four times Kathys age. How old is each?

Piggy says now we've really got a beast who is she talking about

how do you solve 3x-2y=-5 ; 3y-4x=8 for x and y. Explain please.

can you please simplify: sqrt 75x^6

Which statements accurately describe the book The Prince and its ideas and influence? Choose all answers that are correct. A. It is safer for a ruler to be fear

Which of The following is the biggest concern of the neighbors of israel? A)Overpopulation B)urbanization C)Ethnic Diversity D)Refugees please help!!!!