8.1

Question 1

System of equations

Answer 1

Problems with 2 unknown quantities and are often translated using 2 equations with 2 unknowns.

Question 2

Process to solving a system of equation.

Answer 2

look for solution to problem by trying to find a pair of numbers that are true for both.

1. Familiarize
2. Reword and translate by making table

Question 3

Unless noted otherwise how are variables ordered?

Answer 3

Alphabetically

Question 4

Consistent

Answer 4

Any system that has at least one solution

Question 5

Inconsistent

Answer 5

System with no solution

Question 6

Dependent

Answer 6

One equation in system can be obtained by multiplying both sides of another by a constant

Question 7

Substitution method

Answer 7

Relies on having one variable isolated.

Question 8

A system with no solution…graph of equation will ________ intersect

Answer 8

Not

Question 9

Elimination method

Answer 9

Makes use of addition to principal.

If a=b then a+c=b+c

Question 10

Special rules when solving systems of 2 linear equations with 2 variables.

Answer 10

1. If 0=0 infinite # of solutions
   Equations are dependent and solution exists so system is consistent
2. If both sides are not =
   0=7 is false
   No solution and inconsistent

Question 11

Story problems

Motion, distance, rate and time

Answer 11

d=rt
Or
r=d/t
t=d/r

Question 12

Mixing formula

Answer 12

g+s=x

Question 13

Simple interest

Answer 13

Principal•rate•time=interest

p+s=s

Question 14

Motion problems formulas

Answer 14

d=rt

r=d/t

And

t=d/r