Intermediate Algebra
10th Edition
ISBN: 9781285195728
Author: Jerome E. Kaufmann, Karen L. Schwitters
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 8.1, Problem 5CQ
To determine
To check:
The given statement is true or false.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
(a)
(b)
(c)
(d)
de
unique?
Answer the following questions related to the linear system
x + y + z = 2
x-y+z=0
2x + y 2 3
rewrite the linear system into the matrix-vector form A = 5
Fuse elementary row operation to solve this linear system. Is the solution
use elementary row operation to find the inverse of A and then solve
the linear system. Verify the solution is the same as (b).
give the null space of matrix A and find the dimension of null space.
give the column space of matrix A and find the dimension of the column
space of A (Hint: use Rank-Nullity Theorem).
please explain in a clear way
Solve questions by Course Name Ordinary Differential Equations
Chapter 8 Solutions
Intermediate Algebra
Ch. 8.1 - For Problems 110, answer true or false. The graph...Ch. 8.1 - Prob. 2CQCh. 8.1 - Prob. 3CQCh. 8.1 - Prob. 4CQCh. 8.1 - Prob. 5CQCh. 8.1 - Prob. 6CQCh. 8.1 - Prob. 7CQCh. 8.1 - Prob. 8CQCh. 8.1 - Prob. 9CQCh. 8.1 - Prob. 10CQ
Ch. 8.1 - Prob. 1PSCh. 8.1 - Prob. 2PSCh. 8.1 - Prob. 3PSCh. 8.1 - Prob. 4PSCh. 8.1 - Prob. 5PSCh. 8.1 - Prob. 6PSCh. 8.1 - Prob. 7PSCh. 8.1 - Prob. 8PSCh. 8.1 - Prob. 9PSCh. 8.1 - Prob. 10PSCh. 8.1 - Prob. 11PSCh. 8.1 - Prob. 12PSCh. 8.1 - Prob. 13PSCh. 8.1 - Prob. 14PSCh. 8.1 - Prob. 15PSCh. 8.1 - Prob. 16PSCh. 8.1 - Prob. 17PSCh. 8.1 - Prob. 18PSCh. 8.1 - Prob. 19PSCh. 8.1 - Prob. 20PSCh. 8.1 - Prob. 21PSCh. 8.1 - Prob. 22PSCh. 8.1 - Prob. 23PSCh. 8.1 - Prob. 24PSCh. 8.1 - Prob. 25PSCh. 8.1 - Prob. 26PSCh. 8.1 - Prob. 27PSCh. 8.1 - Prob. 28PSCh. 8.1 - Prob. 29PSCh. 8.1 - Prob. 30PSCh. 8.1 - Prob. 31PSCh. 8.1 - Prob. 32PSCh. 8.1 - Prob. 33PSCh. 8.1 - Prob. 34PSCh. 8.1 - Prob. 35PSCh. 8.1 - Prob. 36PSCh. 8.1 - Prob. 37PSCh. 8.1 - Prob. 38PSCh. 8.1 - Prob. 39PSCh. 8.2 - Prob. 1CQCh. 8.2 - Prob. 2CQCh. 8.2 - Prob. 3CQCh. 8.2 - Prob. 4CQCh. 8.2 - Prob. 5CQCh. 8.2 - Prob. 6CQCh. 8.2 - Prob. 7CQCh. 8.2 - Prob. 8CQCh. 8.2 - Prob. 9CQCh. 8.2 - Prob. 10CQCh. 8.2 - Prob. 1PSCh. 8.2 - Prob. 2PSCh. 8.2 - Prob. 3PSCh. 8.2 - Prob. 4PSCh. 8.2 - Prob. 5PSCh. 8.2 - Prob. 6PSCh. 8.2 - Prob. 7PSCh. 8.2 - Prob. 8PSCh. 8.2 - Prob. 9PSCh. 8.2 - Prob. 10PSCh. 8.2 - Prob. 11PSCh. 8.2 - Prob. 12PSCh. 8.2 - Prob. 13PSCh. 8.2 - Prob. 14PSCh. 8.2 - Prob. 15PSCh. 8.2 - Prob. 16PSCh. 8.2 - Prob. 17PSCh. 8.2 - Prob. 18PSCh. 8.2 - Prob. 19PSCh. 8.2 - Prob. 20PSCh. 8.2 - Prob. 21PSCh. 8.2 - Prob. 22PSCh. 8.2 - Prob. 23PSCh. 8.2 - Prob. 24PSCh. 8.2 - Prob. 25PSCh. 8.2 - Prob. 26PSCh. 8.2 - Prob. 27PSCh. 8.2 - Prob. 28PSCh. 8.2 - Prob. 29PSCh. 8.2 - Prob. 30PSCh. 8.2 - Prob. 31PSCh. 8.2 - Prob. 32PSCh. 8.2 - Prob. 33PSCh. 8.2 - Prob. 34PSCh. 8.2 - Prob. 35PSCh. 8.2 - Prob. 36PSCh. 8.2 - Prob. 37PSCh. 8.2 - Prob. 38PSCh. 8.2 - Prob. 39PSCh. 8.2 - Prob. 40PSCh. 8.2 - Prob. 41PSCh. 8.2 - Prob. 42PSCh. 8.2 - Prob. 43PSCh. 8.2 - Prob. 44PSCh. 8.2 - Prob. 45PSCh. 8.2 - Prob. 46PSCh. 8.2 - Prob. 47PSCh. 8.2 - Prob. 48PSCh. 8.2 - Prob. 49PSCh. 8.2 - Prob. 50PSCh. 8.2 - Prob. 51PSCh. 8.2 - Prob. 52PSCh. 8.2 - Prob. 53PSCh. 8.2 - Prob. 54PSCh. 8.2 - Prob. 55PSCh. 8.2 - Prob. 56PSCh. 8.2 - Prob. 57PSCh. 8.2 - Prob. 58PSCh. 8.2 - Prob. 59PSCh. 8.2 - Prob. 60PSCh. 8.2 - Prob. 61PSCh. 8.2 - Prob. 62PSCh. 8.2 - Prob. 63.1PSCh. 8.2 - By expanding (xh)2+(yk)2=r2, we obtain...Ch. 8.2 - Prob. 63.3PSCh. 8.2 - Prob. 63.4PSCh. 8.2 - Prob. 63.5PSCh. 8.2 - Prob. 63.6PSCh. 8.2 - Prob. 64PSCh. 8.2 - Prob. 65PSCh. 8.2 - Prob. 66.1PSCh. 8.2 - Prob. 66.2PSCh. 8.2 - Prob. 66.3PSCh. 8.2 - Prob. 66.4PSCh. 8.2 - Prob. 66.5PSCh. 8.2 - Prob. 66.6PSCh. 8.3 - Prob. 1CQCh. 8.3 - Prob. 2CQCh. 8.3 - Prob. 3CQCh. 8.3 - Prob. 4CQCh. 8.3 - Prob. 5CQCh. 8.3 - Prob. 6CQCh. 8.3 - Prob. 7CQCh. 8.3 - Prob. 8CQCh. 8.3 - Prob. 9CQCh. 8.3 - Prob. 10CQCh. 8.3 - Prob. 1PSCh. 8.3 - Prob. 2PSCh. 8.3 - Prob. 3PSCh. 8.3 - Prob. 4PSCh. 8.3 - Prob. 5PSCh. 8.3 - Prob. 6PSCh. 8.3 - Prob. 7PSCh. 8.3 - Prob. 8PSCh. 8.3 - Prob. 9PSCh. 8.3 - Prob. 10PSCh. 8.3 - Prob. 11PSCh. 8.3 - Prob. 12PSCh. 8.3 - Prob. 13PSCh. 8.3 - Prob. 14PSCh. 8.3 - Prob. 15PSCh. 8.3 - Prob. 16PSCh. 8.3 - Prob. 17PSCh. 8.3 - Prob. 18PSCh. 8.3 - Prob. 19PSCh. 8.3 - Prob. 20PSCh. 8.3 - Prob. 21PSCh. 8.3 - Prob. 22PSCh. 8.3 - Prob. 23PSCh. 8.3 - Prob. 24PSCh. 8.3 - Prob. 25PSCh. 8.3 - Prob. 26PSCh. 8.3 - Prob. 27PSCh. 8.3 - Prob. 28PSCh. 8.3 - Prob. 29PSCh. 8.3 - Prob. 30PSCh. 8.4 - Prob. 1CQCh. 8.4 - Prob. 2CQCh. 8.4 - Prob. 3CQCh. 8.4 - Prob. 4CQCh. 8.4 - Prob. 5CQCh. 8.4 - Prob. 6CQCh. 8.4 - Prob. 7CQCh. 8.4 - Prob. 8CQCh. 8.4 - Prob. 9CQCh. 8.4 - Prob. 10CQCh. 8.4 - Prob. 1PSCh. 8.4 - Prob. 2PSCh. 8.4 - Prob. 3PSCh. 8.4 - Prob. 4PSCh. 8.4 - Prob. 5PSCh. 8.4 - Prob. 6PSCh. 8.4 - Prob. 7PSCh. 8.4 - Prob. 8PSCh. 8.4 - Prob. 9PSCh. 8.4 - Prob. 10PSCh. 8.4 - Prob. 11PSCh. 8.4 - Prob. 12PSCh. 8.4 - Prob. 13PSCh. 8.4 - Prob. 14PSCh. 8.4 - Prob. 15PSCh. 8.4 - Prob. 16PSCh. 8.4 - Prob. 17PSCh. 8.4 - Prob. 18PSCh. 8.4 - Prob. 19PSCh. 8.4 - Prob. 20PSCh. 8.4 - Prob. 21PSCh. 8.4 - Prob. 22PSCh. 8.4 - Prob. 23PSCh. 8.4 - Prob. 24PSCh. 8.4 - Prob. 25PSCh. 8.4 - Prob. 26PSCh. 8.4 - Prob. 27PSCh. 8.4 - Prob. 28PSCh. 8.4 - Prob. 29PSCh. 8.4 - Prob. 30PSCh. 8.4 - Prob. 31PSCh. 8.4 - Prob. 32PSCh. 8.4 - Prob. 33PSCh. 8.4 - Prob. 34PSCh. 8.4 - Prob. 35PSCh. 8.4 - Prob. 36PSCh. 8.4 - Prob. 37PSCh. 8.4 - Prob. 38PSCh. 8.4 - Prob. 39PSCh. 8.4 - Prob. 40.1PSCh. 8.4 - Prob. 40.2PSCh. 8.4 - Prob. 40.3PSCh. 8.4 - Prob. 40.4PSCh. 8.4 - Prob. 40.5PSCh. 8.4 - Prob. 40.6PSCh. 8.4 - Prob. 41.1PSCh. 8.4 - Prob. 41.2PSCh. 8.4 - Prob. 41.3PSCh. 8.4 - Prob. 41.4PSCh. 8.4 - Prob. 41.5PSCh. 8.4 - Prob. 41.6PSCh. 8.4 - Prob. 41.7PSCh. 8.4 - Prob. 41.8PSCh. 8.4 - Prob. 41.9PSCh. 8.4 - Prob. 41.10PSCh. 8.4 - Prob. 42PSCh. 8.S - Prob. 1SCh. 8.S - Prob. 2SCh. 8.S - Prob. 3SCh. 8.S - Prob. 4SCh. 8.S - Prob. 5SCh. 8.S - Prob. 6SCh. 8.S - Prob. 7SCh. 8.S - Prob. 8SCh. 8.CR - Prob. 1CRCh. 8.CR - Prob. 2CRCh. 8.CR - Prob. 3CRCh. 8.CR - Prob. 4CRCh. 8.CR - Prob. 5CRCh. 8.CR - Prob. 6CRCh. 8.CR - Prob. 7CRCh. 8.CR - Prob. 8CRCh. 8.CR - Prob. 9CRCh. 8.CR - Prob. 10CRCh. 8.CR - Prob. 11CRCh. 8.CR - Prob. 12CRCh. 8.CR - Prob. 13CRCh. 8.CR - Prob. 14CRCh. 8.CR - Prob. 15CRCh. 8.CR - Prob. 16CRCh. 8.CR - Prob. 17CRCh. 8.CR - Prob. 18CRCh. 8.CR - Prob. 19CRCh. 8.CR - Prob. 20CRCh. 8.CR - Prob. 21CRCh. 8.CR - Prob. 22CRCh. 8.CR - Prob. 23CRCh. 8.CR - Prob. 24CRCh. 8.CR - Prob. 25CRCh. 8.CR - Prob. 26CRCh. 8.CR - Prob. 27CRCh. 8.CR - Prob. 28CRCh. 8.CR - Prob. 29CRCh. 8.CR - Prob. 30CRCh. 8.CR - Prob. 31CRCh. 8.CR - Prob. 32CRCh. 8.CR - Prob. 33CRCh. 8.CR - For Problems 3150, graph each equation....Ch. 8.CR - Prob. 35CRCh. 8.CR - Prob. 36CRCh. 8.CR - Prob. 37CRCh. 8.CR - Prob. 38CRCh. 8.CR - Prob. 39CRCh. 8.CR - Prob. 40CRCh. 8.CR - Prob. 41CRCh. 8.CR - Prob. 42CRCh. 8.CR - Prob. 43CRCh. 8.CR - Prob. 44CRCh. 8.CR - Prob. 45CRCh. 8.CR - Prob. 46CRCh. 8.CR - Prob. 47CRCh. 8.CR - Prob. 48CRCh. 8.CR - Prob. 49CRCh. 8.CR - Prob. 50CRCh. 8.CT - Prob. 1CTCh. 8.CT - Prob. 2CTCh. 8.CT - Prob. 3CTCh. 8.CT - Prob. 4CTCh. 8.CT - Prob. 5CTCh. 8.CT - Prob. 6CTCh. 8.CT - Prob. 7CTCh. 8.CT - Prob. 12CTCh. 8.CT - Prob. 13CTCh. 8.CT - Prob. 14CTCh. 8.CT - Prob. 15CTCh. 8.CT - Prob. 16CTCh. 8.CT - Prob. 17CTCh. 8.CT - Prob. 18CTCh. 8.CT - Prob. 19CTCh. 8.CT - Prob. 20CTCh. 8.CT - Prob. 21CTCh. 8.CT - Prob. 22CTCh. 8.CT - Prob. 23CTCh. 8.CT - Prob. 24CTCh. 8.CT - Prob. 25CTCh. 8.CM - Prob. 1CMCh. 8.CM - Prob. 2CMCh. 8.CM - Prob. 3CMCh. 8.CM - Prob. 4CMCh. 8.CM - Prob. 5CMCh. 8.CM - Prob. 6CMCh. 8.CM - Prob. 7CMCh. 8.CM - Prob. 8CMCh. 8.CM - Prob. 9CMCh. 8.CM - Prob. 10CMCh. 8.CM - Prob. 11CMCh. 8.CM - Prob. 12CMCh. 8.CM - Prob. 13CMCh. 8.CM - Prob. 14CMCh. 8.CM - Prob. 15CMCh. 8.CM - Prob. 16CMCh. 8.CM - Prob. 17CMCh. 8.CM - Prob. 18CMCh. 8.CM - Prob. 19CMCh. 8.CM - Prob. 20CMCh. 8.CM - Prob. 21CMCh. 8.CM - Prob. 22CMCh. 8.CM - Prob. 23CMCh. 8.CM - Prob. 24CMCh. 8.CM - Prob. 25CMCh. 8.CM - Prob. 26CMCh. 8.CM - Prob. 27CMCh. 8.CM - Prob. 28CMCh. 8.CM - Prob. 29CMCh. 8.CM - Prob. 30CMCh. 8.CM - Prob. 31CMCh. 8.CM - Prob. 32CMCh. 8.CM - Prob. 33CMCh. 8.CM - Prob. 34CMCh. 8.CM - Prob. 35CMCh. 8.CM - Prob. 36CMCh. 8.CM - Prob. 37CMCh. 8.CM - Prob. 38CMCh. 8.CM - Prob. 39CMCh. 8.CM - Prob. 40CMCh. 8.CM - Prob. 41CMCh. 8.CM - Prob. 42CMCh. 8.CM - Prob. 43CMCh. 8.CM - Prob. 44CMCh. 8.CM - Prob. 45CMCh. 8.CM - Prob. 46CMCh. 8.CM - Prob. 47CMCh. 8.CM - Prob. 48CMCh. 8.CM - Prob. 49CMCh. 8.CM - Prob. 50CMCh. 8.CM - Prob. 51CMCh. 8.CM - Prob. 52CMCh. 8.CM - Prob. 53CMCh. 8.CM - Prob. 54CMCh. 8.CM - Prob. 55CMCh. 8.CM - Prob. 56CMCh. 8.CM - For Problems 5564, solve inequality and express...Ch. 8.CM - Prob. 58CMCh. 8.CM - Prob. 59CMCh. 8.CM - Prob. 60CMCh. 8.CM - Prob. 61CMCh. 8.CM - Prob. 62CMCh. 8.CM - Prob. 63CMCh. 8.CM - Prob. 64CMCh. 8.CM - Prob. 65CMCh. 8.CM - For Problems 65-70, graph the following equations....Ch. 8.CM - Prob. 67CMCh. 8.CM - Prob. 68CMCh. 8.CM - Prob. 69CMCh. 8.CM - Prob. 70CMCh. 8.CM - Prob. 71CMCh. 8.CM - Prob. 72CMCh. 8.CM - Prob. 73CMCh. 8.CM - Prob. 74CMCh. 8.CM - Prob. 75CMCh. 8.CM - Prob. 76CMCh. 8.CM - Prob. 77CMCh. 8.CM - Prob. 78CMCh. 8.CM - Prob. 79CMCh. 8.CM - Prob. 80CMCh. 8.CM - Prob. 81CMCh. 8.CM - Prob. 82CMCh. 8.CM - Prob. 83CMCh. 8.CM - Prob. 84CMCh. 8.CM - Prob. 85CMCh. 8.CM - Prob. 86CMCh. 8.CM - Prob. 87CMCh. 8.CM - Prob. 88CM
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, algebra and related others by exploring similar questions and additional content below.Similar questions
- Determine whether it's true or false and the reasoning is neededarrow_forward1. (20 pts) Determine whether the following statements are true (T) or false (F)? (A reasoning is required.) (1) Let V be the set of all ordered pairs of real numbers. Consider the following addition and scalar multiplication operations on u = u= (u1, u2) and v = (v1, v2): u + v = (U₁ + V₁, U₂ + v₂), ku = (ku₁, u₂). Is V a vector space under the above operations? U2 (2) The set Mmxn of all m×n matrices with the usual operations of addition and scalar multiplication is a vector space. α (3) The dimension of the vector space of all matrices A = [a b] in R2×2 with a+d=0 is 4. (4) The coordinate vector of p(x) = 2-x+x² in P3 relative to the basis S = {1, 1+x, x + x2} is [4 -2 1]. (5) If a 6×4 matrix A has a rank 3, then the dimension of N(A) is 3.arrow_forward5. (20%) The linear transformation L: P3 → P2 defined by L(f(x)) = f'(x)+ f(0). (a) Find the representing matrix A of L with respect to the ordered basis {x2, x, 1} for P3, and the ordered basis {2,1 - x} for P2. (b) Find the coordinates of the f(x) = 2x² +2 in P3 with respect to the ordered basis {x2,-x, 1}, and find the coordinates of L(f(x)) with respect to the ordered basis {2,1-x}arrow_forward
- For the spinner below, assume that the pointer can never lie on a borderline. Find the following probabilities. (enter the probabilities as fractions)arrow_forwardQuestions 1. Identify and describe potential bias in the study. 2. Identify and describe the way in which the selected participants may or may not represent the population as a whole. 3. Identify and describe the possible problems with the end results since the majority will be from females rather than an even split. 4. Identify and describe the possible problems with identifying females as possibly more vulnerable based on the data collected. 5. Identify a possible null hypothesis and problems in how the study might address this null hypothesis. 6. Identify one possible method of improving the study design and describe how it would improve the validity of the conclusions. 7. Identify a second possible method of improving the study design and describe how it would improve the validity of the conclusions.arrow_forwardThe Course Name Real Analysis please Solve questions by Real Analysisarrow_forward
- part 3 of the question is: A power outage occurs 6 min after the ride started. Passengers must wait for their cage to be manually cranked into the lowest position in order to exit the ride. Sine function model: where h is the height of the last passenger above the ground measured in feet and t is the time of operation of the ride in minutes. What is the height of the last passenger at the moment of the power outage? Verify your answer by evaluating the sine function model. Will the last passenger to board the ride need to wait in order to exit the ride? Explain.arrow_forward2. The duration of the ride is 15 min. (a) How many times does the last passenger who boarded the ride make a complete loop on the Ferris wheel? (b) What is the position of that passenger when the ride ends?arrow_forward3. A scientist recorded the movement of a pendulum for 10 s. The scientist began recording when the pendulum was at its resting position. The pendulum then moved right (positive displacement) and left (negative displacement) several times. The pendulum took 4 s to swing to the right and the left and then return to its resting position. The pendulum's furthest distance to either side was 6 in. Graph the function that represents the pendulum's displacement as a function of time. Answer: f(t) (a) Write an equation to represent the displacement of the pendulum as a function of time. (b) Graph the function. 10 9 8 7 6 5 4 3 2 1 0 t 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 -1 -5. -6 -7 -8 -9 -10-arrow_forward
- A power outage occurs 6 min after the ride started. Passengers must wait for their cage to be manually cranked into the lowest position in order to exit the ride. Sine function model: h = −82.5 cos (3πt) + 97.5 where h is the height of the last passenger above the ground measured in feet and t is the time of operation of the ride in minutes. (a) What is the height of the last passenger at the moment of the power outage? Verify your answer by evaluating the sine function model. (b) Will the last passenger to board the ride need to wait in order to exit the ride? Explain.arrow_forwardThe Colossus Ferris wheel debuted at the 1984 New Orleans World's Fair. The ride is 180 ft tall, and passengers board the ride at an initial height of 15 ft above the ground. The height above ground, h, of a passenger on the ride is a periodic function of time, t. The graph displays the height above ground of the last passenger to board over the course of the 15 min ride. Height of Passenger in Ferris Wheel 180 160 140- €120 Height, h (ft) 100 80 60 40 20 0 ך 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Time of operation, t (min) Sine function model: h = −82.5 cos (3πt) + 97.5 where h is the height of the passenger above the ground measured in feet and t is the time of operation of the ride in minutes. What is the period of the sine function model? Interpret the period you found in the context of the operation of the Ferris wheel. Answer:arrow_forward1. Graph the function f(x)=sin(x) −2¸ Answer: y -2π 一元 1 −1 -2 -3 -4+ 元 2πarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Intermediate AlgebraAlgebraISBN:9781285195728Author:Jerome E. Kaufmann, Karen L. SchwittersPublisher:Cengage Learning
Algebra for College StudentsAlgebraISBN:9781285195780Author:Jerome E. Kaufmann, Karen L. SchwittersPublisher:Cengage Learning
Elementary AlgebraAlgebraISBN:9780998625713Author:Lynn Marecek, MaryAnne Anthony-SmithPublisher:OpenStax - Rice University
Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal Littell
College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
Intermediate Algebra
Algebra
ISBN:9781285195728
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Cengage Learning
Algebra for College Students
Algebra
ISBN:9781285195780
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Cengage Learning
Elementary Algebra
Algebra
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:OpenStax - Rice University
Algebra: Structure And Method, Book 1
Algebra
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:McDougal Littell
College Algebra (MindTap Course List)
Algebra
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning
Finding The Focus and Directrix of a Parabola - Conic Sections; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=KYgmOTLbuqE;License: Standard YouTube License, CC-BY