Question 1: Solve these linearequations for x, y, and z,
3x + 5y - 2x = 20
4x - 10y - z = -25
x + y - z = 5
the value of x is in the range
(1) -4 <= x <= -3
(2) -2 <= x <= 0
(3) 0 <= x <= 2
(4) 2 <= x <= 4
Note: "<=" means "less than or equal to"
Question 2: The value of y in Question 1 above lies in the range

1. Solve each system by graphing.
y = - 2/3 x
2x + 3y = 5
2. Solve each system by the substitution method. Determine whether the equations are independent, dependent, or inconsistent.
2x - y = 4
2x - y = 3
3. Write a system of two equations in two unknowns for each problem. Solve each system by substation.

Solvingequations: Solve the linear expession, show your work and check your answer
#26. 5x + 7 = 0
#32. 14 = -5x - 21
Solving a variable: Solve each formula for the specified variable
#18. d = rt for r
The language of functions: For each formula express y as a function of x.
#22. y - x = 6
Solve each compound ineq

i) Solve he following equation by the quadratic formula :
3X^2 + 4X -23 = 0
ii) Find the values of x and y that satisfy the equations here given
( use the simultaneous equation method ) :
3x + 2y = 22
2x + 3y = 23
iii) Solve graphically the following equations: show the graph as a part of the solu

We described three methods to solvingLinearSystems with two Equations. They are the Graph method, the Elimination method, and the Substitution method. When would you use each method? What makes each method better than the other methods?

Determine whether the lines will be perpendicular when graphed.
3x - 2y = 6
2x + 3y = 6
Solve the system of equations by the substitution method
x + 3y = 32
-3x + 2y = 3
Solve the system of equations
x + y = 5
x - y = -9

1. Solve the system by addition.
x + 4y = 2
3x - 2y = -22
2. Solve the system by addition.
x + y = 8
x - y = 8
3. Solve the system by addition.
5x - 3y = 13
4x - 3y = 11

1. Determine which of the following are linearequationsand which are not linearequations. State the reason for your answer.
(a) x + y = 1000
(b) 3xy + 2y + 15z - 20 = 0
(c) 2xy + 4yz = 8
(d) 2x + 3y 4z = 6.