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

If an inspector found a problem with an immigrant’s paperwork, what would most likely happen to that immigrant?

A child has a sickle-cell disease but neither parent is ill. what must be true of her parents genotypes

How has Kansas adapted to the environment

Which part of the cell membrane acts as a barrier to hydrophilic molecules entering the cell?

During the Vietnam War, the Viet Cong had the advantage of superior equipment and firepower. superior geographic knowledge of the region. support of the South V

Muchachas colombianas son bonitas

Identify all the points that are on the following quadratic function: y = x2 - 3x

Do you use quotation marks for book titles

Need help please. Kind of confused

The chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this conc