Question

a company makes 3 types of cable, CABLE A requires 3 black, 3 white, and 2 red wires. B requires 1 black, 2 white, and 1 red. C requires 2 black, 1 white, and 2 re. They used 100 black, 110 white and 90red wires. How many of each cable were made?

a) 10 cable A: 3O cable B; 20 cable C.
b) 10 cable ; 103 cable B; 20 cable C.
c) 20 cable A; 30 cable B; 10 cable C.
d)10 cable A; 30 cable B; 93 cable C.
i need the process pleaseee

Answer 1

yeah yeah hahaha thanks! but i dont know how to replace b can you help mee doing that?

Answer 2

so the answer is? a, b, c or d?

Answer 3

Ok, I did that problem totally wrong here u go Let
A = number of cable A

B = number of Cable B
C = number of Cable C


# of Black wires used = 3A + 1B + 2C = 100
# of White wires used = 3A + 2B + 1C = 110
# of Red Wires used = 2A + 1B + 2C= 90

you have a system on three equations with three unknowns. Solve the system of equations.

solution:
A = 10, B = 30, C = 20!

Answer 4

thats the point idont know how to solve the system of linear equation hahaha:( can you help meee?

Answer 5

http://www.mathwarehouse.com/algebra/linear_equation/systems-of-equation/index.php
This helped me :)