Answer:
see explanation
Step-by-step explanation:
Given the 3 equations
3x + 5y + 5z = 1 → (1)
x - 2y = 5 → (2)
2x + 4y = 11 → (3)
Use (2) and (3) to solve for x and y
Multiply (2) by 2
2x - 4y = 10 → (4)
Add (3) and (4) term by term
4x = 21 ( divide both sides by 4 )
x = 
Substitute this value of x into (3)
2 × + 4y = 11
+ 4y = 11 ( subtract from both sides )
4y = 
( divide both sides by 4 )
y = 
Substitute the values of x and y into (1) and solve for z
3 × + 5 × + 5z = 1
+ 
+ 5z = 1
+ 5z = 1 ( subtract from both sides )
5z = - 
( divide both sides by 5 )
z = - 
Solution is
x = , y = , z = -
Answer:
The Second one y=1/3x
Step-by-step explanation:
Because when you substitute x by 3 ( for example) then, you get y = 1
and that's right from the graph.
Answer: 90° counterclockwise rotation about the origin
Step-by-step explanation: Coordinates..
green:
A(-9, 5)
B(-4, 5)
C(-5, -3)
D(-8, -3)
red:
A(5, 9)
B(5, 4)
C(-3, 5)
D(-3, 8)
Answer:
=
1
1
=
−
1
1
Step-by-step explanation:
