Answer:
You have to eliminate one of the variables when the equations are added.
A) x + 2y + z = 10
B) 2x -y +3z = -5
C) 2x -3y -5z = 27
We mulutiply A) by 2 then add it to B and C
A) 2x + 4y + 2z = 20 and the sum =
6x = 42 Luckily, the "y" and "z" variables cancel out and we find:
x = 7
Then we use x =7 in calcucating equation A) and B)
A) 2y + z = 3
B) -y + 3z = -19
THEN solve for y and z by eliminating variables.
Step-by-step explanation:
A deck of card is made up of 4 suits: clubs, diamonds, hearts and spades. each suit has 13 cards ranging from: 2,3,4,5,6,7,8,9,1
Amiraneli [1.4K]
The probability of drawing a 7 or 8 from a decl of playing cards is 2/13.
<span>(12xy)^2
Expand:
12^2*x^2*y^2
= 144x^2*y^2</span>
Answer:
Multiply (x)
Step-by-step explanation:
If you multiply 15.5 x 3.90 it will give you the total amount of money Chris and Jeff earned.