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

1. Globalization threatens the environment. Pollution is one example. As globalization leads to economic development in developing nations, an unintended result

Jeremy has a batting average of 0.235 . What is the batting average written in expanded form?

Need help graphing each linear function?

A fundamental difference between descartes's psychology and that of locke was their position about the existence of ____.

what are the witches doing at the beginning of Act 4?

Help please 1-12 i will give thanks or brainliest

Does the following represent the Substitution Property? If y = 2x and x = 6 then y = 12.

Which actions reflect the Republican Party’s position on energy? Check all that apply. A. eliminating the use of nuclear power B. encouraging energy independenc

Find the area of the shaded sections. A). A= 16 B). A= 16/3π C). A= 27π D). A= 4π - 8 E). A= 9π - 9/2 √3

Andrew is 17 years old, which is 3 years more than twice as old as his sister. Andrew's sister is a years old. Which value of a makes the equation 17 = 2a + 3 t