Algebra Unit Review

• Yes, since when you plug in the values for x, you get the left side and the right side of the equation to be equivalent, this means the equation is an identity.

• Yes, since when you distribute the x and the -1 on the left side of the equation you get equivalent expressions, this means the equation is an identity.

• No, since when you distribute the x and the -1 on the left side of the equation you get two equations that are not equivalent, there the equation is not an identity.

• What's an identity?

What does T(5) mean in this situation?

• The time it takes to go 100 miles against a 5 mph current

• The time is takes to go 5 miles against a 100 mph current

• It takes 5 hours to go the 100 miles against a 5 mph current.

• A boat rides sounds nice

At what value of c does the graph has a vertical asymptote? Explain how you know what this asymptote means in this situation?

• 12, if the current is going the same speed as the boat, the boat will not move

• 12, it means if speed of boat is 12 the current doesn't matter

• 100, it means the boat is going too fast

• No vertical asymptote, division by zero is fun, all the cool kids are doing it

Which of the following inequalities matches the graph?

• y ≤ 3/4x + 5

• y ≥ 3/4x + 5

• y < 3/4x + 5

• y > 3/4x + 5

Which color is the solution region to this system of inequaliteis?

• White

• Blue

• Purple

• Red

Solve by elimination:
9x-4y=7

x-4y=-17

• (-1,5)

• (-7,5)

• (7,5)

• (3,5)

What is the slope-intercept form of a line?

• Ax + By = C

• y = mx + b

• y - y1 = m(x - x1)

• y = Ax + By

What does "b" represent in y=mx+b?

• y-intercept

• slope

• the origin

• x-intercept

Find the x and y intercepts
4x - 5y = 40

• x intercept is 10 
  y intercept is 8

• x intercept is 10
  y intercept is 20

• x intercept is 8
  y intercept is 10

• x intercept is 10
  y intercept is -8

When graphing an inequality, you use a dotted line when you use which symbol?

• <, >

• ≤, ≥