Systems of Equations (Substitution)

Name:

Class:

Date:

Show your work for each problem.

1.
In the system , which equation should you substitute INTO?
1. a)
2. b)Neither equation
3. c)Either one works the same
4. d)
2.
Solve for :
3.
What is the first step to solve by substitution?
1. a)Multiply both equations by 3
2. b)Isolate or in one equation
3. c)Graph both equations
4. d)Add the equations together
4.
Solve for :
5.
Solve the system:
6.
Solve the system:
1. a)
2. b)
3. c)
4. d)
7.
Solve for :
8.
Solve:
9.
Solve:
10.
What happens when you solve by substitution?
1. a)No solution ()
2. b)One solution
3. c)One solution
4. d)Infinitely many solutions ()
11.
Solve for :
12.
A movie theater sold 200 tickets. Adult tickets cost 15 euros and child tickets cost 10 euros. Total revenue was 2500 euros. How many adult tickets were sold?
13.
Solve:
14.
What happens when you solve by substitution?
1. a)One solution
2. b)No solution ()
3. c)Infinitely many solutions
4. d)One solution
15.
A chemist needs 500 mL of a 40% acid solution. She has a 25% solution and a 50% solution. How many mL of the 50% solution should she use?