Mini Review. y= x + 1 y = -x + 3 The solution is (1, 2)

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Presentation transcript:

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