Mini Review
y= x + 1
y = -x + 3
The solution is
(1, 2)
X + 2y = -2
-3x -6y = 6
There are
infinitely many
solutions
x+y=2
y = 2x + 5
(-1, 3)
Solve the System
y – 2x = -5
y – x = -3
(2, -1)
Solve the System
2x – y = -8
2x + y = 4
(-1, 6)
Solve the System
x + 4y + z = 12
y – 3z = -7
z=3
(1, 2, 3)
Solve the System
x + y + 2z = 5
x + 2y + z = 8
2x + 3y – z = 1
(-7, 6, 3)
2x – y = 9
5x + 2y = 27
(5, 1)
Solve the System
3x + 5y = 8
4x + 7z = 18
y+z=3
(1, 1, 2)
y≤2
x>3
Graph the system of linear
inequalities
x≥0
y≥0
2x + y ≤ 4
Earning money
You work at a grocery store. Your hourly
wage is greater after 6:00 p.m. than it is
during the day. One week you work 20
daytime hours and 20 evening hours
and earn $280. Another week you work
30 day time hours and 12 evening
hours and earn a total of $276. What is
your daytime rate? What is your
evening rate?
daytime = $6
evening = $8
Telethon
During a recent telethon,
people pledged $25 or $50.
Twice as many people pledged
$25 as $50. Altogether, $18,000
was pledged. How many people
pledged $25?
360