Algebra 2 Quarter 1 Test Flashcards

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Questions and Answers

Select all of the irrational numbers.

  • √2 (correct)
  • √34 (correct)
  • Ï€ (correct)
  • All of the above

Which inequality and graph represent all possible solutions of: |−3x|≤6?

{-2≤x≤2}

What is the probability of tossing heads using Jeff and Kevin's results?

11/20

What is the correct solution mentioned in the problem?

<p>7</p> Signup and view all the answers

Select all sets of numbers that √31 belongs to.

<p>Irrational numbers (A), Real numbers (B)</p> Signup and view all the answers

What is the value of 1/6 ÷ (-3/18)?

<p>-1</p> Signup and view all the answers

What is the value of 4(3h-6)/1+h for h = -2?

<p>48</p> Signup and view all the answers

What is the opposite and the reciprocal of 500?

<p>Opposite: -500, Reciprocal: 1/500</p> Signup and view all the answers

What is the solution to 3y+20= 3+2y?

<p>-17</p> Signup and view all the answers

What does the graph represent for: −6≤2x≤6?

<p>{-3≤x≤3}</p> Signup and view all the answers

Which points represent the graph for y = 2x + 1?

<p>(0, 2) (A), (-1, 0) (D)</p> Signup and view all the answers

What is the slope of the line represented by the equation 3x + 5y = -15?

<p>-3/5</p> Signup and view all the answers

Choose the set of ordered pairs that represents a function.

<p>{(-3,-5),(-5,-3),(-7,-7)}</p> Signup and view all the answers

Which ordered pair is a solution to the equation represented by the graph?

<p>(0,-1)</p> Signup and view all the answers

What is the slope of the line passing through the points (-8,3) and (-7,-5)?

<p>-8</p> Signup and view all the answers

Select all true statements about the graph.

<p>The line has an equation of y = 4 (A), The line has a slope of zero (C), The line has no x-intercepts (D)</p> Signup and view all the answers

What are the slope and y-intercept of the line given by 12x - 4y = -96?

<p>m = 3, y-intercept = 24</p> Signup and view all the answers

What is the vertex of the equation y = |x + 2| - 4?

<p>-2, -4</p> Signup and view all the answers

What is the y-intercept of the line 9x + 6y + 1 = 0?

<p>-1/6</p> Signup and view all the answers

What is the solution set for the system of equations: x + 2y + z = 5, 2x - 6 + 5z = 3, x + 3z = 3?

<p>0, 2, 1</p> Signup and view all the answers

What is the solution set for the equations: x - y + z = -1, x + y + 3z = -3, 2x - y + 2z = 0?

<p>4, 2, -3</p> Signup and view all the answers

What is the solution set for the equations: 6x + y = 7, x + 12y = 13?

<p>1, 1</p> Signup and view all the answers

What is the solution set for the equations: 2x + 3y = 12, 3x + 4y = 17?

<p>3, 2</p> Signup and view all the answers

What is the solution set for the system of equations: x + 2y + z = 4, 2x - y + 4z = -8, -3x + y - 2z = -1?

<p>3, 2, -3</p> Signup and view all the answers

What is the solution set for the equations: 5z + 4y = 4, 3x - 2y = 0, x + 3z = -8?

<p>4, 6, -4</p> Signup and view all the answers

What is the solution set for the equations: 4x - y + z = -5, -x + y - z = 5, 2x - z - 1 = y?

<p>0, 2, -3</p> Signup and view all the answers

What is the solution set for the equations: 2x + 7y = 15, 3x - 6y = 6?

<p>4, 1</p> Signup and view all the answers

What is the solution set for the equations: x - y + z = -1, x + y + 3z = -3, 2x - y + 2x = 0?

<p>4, 2, -3</p> Signup and view all the answers

What is the answer to the video game word problem?

<p>5</p> Signup and view all the answers

Identify the vertex and the y-intercept of the function y = -3(x + 2)^2 + 5.

<p>Vertex: (-2, 5), Y-Intercept: (0, -7)</p> Signup and view all the answers

Write in the vertex form: y = 2x^2 + 12x + 8.

<p>y = 2(x + 3)^2 - 10</p> Signup and view all the answers

What is the vertex and y-intercept of the function y = 2(x - 2)^2 - 4?

<p>Vertex: (2, -4), Y-Intercept: 4</p> Signup and view all the answers

Factor the expression: -15x^2 + 15x + 20.

<p>5(-3x + 3x + 4)</p> Signup and view all the answers

Select an equivalent expression to x^2 + 10x + 16.

<p>(x + 2)(x + 8)</p> Signup and view all the answers

Select an expression equivalent to 3x^2 + 14x + 16.

<p>(x + 2)(3x + 8)</p> Signup and view all the answers

Write 3 + √-49 in the form of a + bi.

<p>3 + 7i</p> Signup and view all the answers

Write -3 - √-180 in the form of a + bi.

<p>-3 - 6i√5</p> Signup and view all the answers

Find the absolute value of |-5 + i|.

<p>√26</p> Signup and view all the answers

Simplify (3i)(-i).

<p>3</p> Signup and view all the answers

Given the function y = 2x^2 - 8x + 4, find the y-intercept and the vertex.

<p>y-intercept: 4, Vertex: (2, 4)</p> Signup and view all the answers

Enter the value equivalent to (-3 + 4i) - (2 + 6i).

<p>-5 - 2i</p> Signup and view all the answers

Simplify (-4 - 4i)(3 + 2i).

<p>-4 - 20i</p> Signup and view all the answers

Indicate whether the equation 5/20x = 1/4x has solutions.

<p>Infinitely many real solutions</p> Signup and view all the answers

Indicate whether the equation 3x = 4x + 5x has solutions.

<p>One real solution</p> Signup and view all the answers

Indicate whether the equation √2x + 3 + 6 = 0 has solutions.

<p>No real solutions</p> Signup and view all the answers

How long will it take the stone to hit the ground as modeled by y = −16t^2 + 358?

<p>Round to the nearest hundredth of a second.</p> Signup and view all the answers

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Study Notes

Irrational Numbers

  • Examples include √2, √34, and Ï€.
  • √31 belongs to irrational and real numbers.

Inequalities

  • The inequality |−3x|≤6 translates to the solution set {-2≤x≤2}.
  • The graph for −6≤2x≤6 corresponds to {-3≤x≤3}.

Probability

  • The probability of tossing heads, based on Jeff and Kevin's coin toss results, is 11/20.

Mistakes in Solutions

  • In a multi-step problem, the first mistake occurs in step 1; the correct solution is 7.

Algebraic Evaluations

  • The value of 1/6 ÷ (-3/18) is -1.
  • For h = -2 in the expression 4(3h-6)/(1+h), the result is 48.

Opposites and Reciprocals

  • The opposite of 500 is -500, and the reciprocal is 1/500.

Graph Representations

  • The graph of the equation y = 2x + 1 passes through points (-1,0) and (0,2).
  • The slope of the line defined by 3x + 5y = -15 is -3/5.

Function and Ordered Pairs

  • The ordered pairs {(-3,-5), (-5,-3), (-7,-7)} represent a function.
  • The ordered pair (0,-1) is a solution to the equation represented by the graph.

Slope Calculations

  • The slope of the line through points (-8,3) and (-7,-5) is -8.
  • For the equation 12x - 4y = -96, the slope is 3 and the y-intercept is 24.

Vertex and Intercepts

  • The vertex of y = |x+2| -4 is at (-2,-4).
  • The y-intercept of 9x + 6y + 1 = 0 is -1/6.

Systems of Equations Solutions

  • For x + 2y + z = 5, 2x - 6 + 5z = 3, x + 3z = 3, the solution set is (0, 2, 1).
  • The systems of equations yield solutions (4,2,-3), (1,1), and (3,2) for other specified sets.

Polynomial Factoring and Forms

  • Vertex form of the polynomial y = 2x² + 12x + 8 is y = 2(x + 3)² - 10.
  • (x^2 + 10x + 16) can be factored to (x+2)(x+8) and (3x^2 + 14x + 16) to (x+2)(3x+8).

Complex Numbers

  • Convert 3 + √-49 to the form a + bi gives 3 + 7i.
  • Simplifying -3 - √-180 results in -3 - 6i√5.

Absolute and Imaginary Values

  • The absolute value of |-5 + i| is √26.
  • Simplifying (3i)(-i) results in 3.

Graph Heights and Time

  • In the function y = −16t² + 358, it models the height of a stone dropped from a cliff. The time to hit the ground can be calculated using a quadratic equation setup.

Solutions Types for Equations

  • The equation 5/20x = 1/4x has infinitely many solutions.
  • The equation 3x = 4x + 5x has one real solution.
  • The equation √(2x+3) + 6 = 0 has no real solutions.

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