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

Which materials has magnetic domains and can be made into a magnet? (A)Plastic (B)An iron nail (C) An aluminum can (D)A glass bottle

The length of the shadow of a building is 120 meters, as shown below: The shadow of a building is 120 meters long. The acute angle that the shadow makes with th

Please Help Thank You

Biological treatment plants make some hazardous-waste safe by

In negative self talk, personalizing is when a person _______. a. Focuses only on their problems, ignoring their successes b. Blames themselves for every proble

A male has an _____ combination in the _____.

Please help! What is the order of 4 × 10^-7, 7 × 10^-9, 1 × 10^4, 2 × 10^4 from least to greatest? A. 1 × 10^4, 2 × 10^4, 4 × 10^-7, 7 × 10^-9 B. 4 × 10^-7, 7 ×

A rectangular prism has a length of 12 cm and a width of 4 cm. If the volume of the prism is 240 cm3, what is the height?

What is the biological significance of meiosis and mitosis

What is the approximate percent decrease from 1,865 to 1,240? 33.5% 50% 66.5% 150%