foddlyneedhelp foddlyneedhelp

01-06-2018
Mathematics

contestada

Alex and Benny had 440 cards. Alex and Cruz had 320 cards. Benny had 3 times as many cards as Cruz. How many cards did Alex have?

Respuesta :

ashleyspandya ashleyspandya

10-06-2018

260 cards.

Process:
A = Alex
B = Benny
C = Cruz

a+b=440
a+c=320

a=440-b
a=320-c

a=440-b=320-c

b=3c

a=440-(3c)=320-c
-3c+440 = -c+320
-3c=-c-120
-2c=-120
c=60

a=320-c
a=320-60

a=260

Answer Link

Otras preguntas

aircraft costs $2901 dollars per hour to operate. The algebraic expression 2901t gives the total cost to operate the aircraft for t hours. Find the total cost

Please help! Please try to answer all imma be honest I don't know any.

The relational operators have the property of _____; that is, the use of relational algebra operators on existing relations (tables) produces new relations.

Find the real solutions of the equation 2 + 6x - 5 = x Select the correct choice below and, if O A. The solution set is

A forensic investigator is collecting hair samples from the victims and possible suspects of a violent attack. How many control samples of full length scalp ha

What method do all scientists, across all fields, use in the pursuit of scientific knowledge? 1. They generate or use empirical evidence to study something abou

please help i need it quick 2x + 5x-4-7 (x+1) - 5

the slope of the line that passes through the point (2 4) and (3 8) is

pls I need help pls

What are consumer goods