1.8 warm-up 2

1. 1.8 warm-up 2 Simplify the expression 8(x+3)-4x-(x+1) a. 3x+2 b. 3x+4 c. 3x+23 d. 3x+25 2

2. 1.8 warm-up Simplify the expression 8(x+3)-4x-(x+1) a. 3x+2 b. 3x+4 c. 3x+23 d. 3x+25 2

3. You will determine the validity of a conditional statement and its converse. You will also find counterexamples to disprove statements that are false. 2.1 Conditional Statements Pardekooper

4. You forgot p q Conditional Statements If-then Statement: one statement depends on the result of a condition. hypothesis conclusion If , then 1st part, If ____ 2nd part, then ____ Example: ''If Deanna eats the last cookie, then Leon will buy more.'‘ hypothesis conclusion Pardekooper

5. You forgot q p again Converse Statements switch the hypothesis and the conclusion conclusion hypothesis If , then 1st part, If ____ 2nd part, then ____ Example: ''If Leon buys some more cookies, then Deanna will eat the last one.'‘ conclusion hypothesis Pardekooper

6. Lets try one hypothesis: conclusion: this had been an actual emergency the attention signal you just heard would have been followed by official information, news, or instruction Conditional Ifthis had been an actual emergency, then the attention signal you just heard would have been followed by official information, news, or instruction. Note: The conditional of p →q where ‘→’ means ‘implies.’ Pardekooper

7. Lets try one hypothesis: conclusion: this had been an actual emergency the attention signal you just heard would have been followed by official information, news, or instruction Converse Ifthe attention signal you just heard would have been followed by official information, news, or instruction, then this had been an actual emergency. Note: The converse of p →q is q → p. ‘→’ means ‘implies.’ Pardekooper

8. Negation Statements the denial of a statement If a statement is true, then its negation is false. If a statement is false, then its negation is true. Pardekooper

9. Negation Statements Example:. hypothesis: conclusion: the attention signal you just heard would not have been followed by official information, news, or instruction this had not been an actual emergency Ifthis hadnotbeen an actual emergency, thenthe attention signal you just heard wouldnot have been followed by official information, news, or instruction. Meadows & Pardekooper Note: The inverse of p → q is ~p → ~q. ‘~’ means ‘not.’

10. Contrapositive Statements created by negating the hypothesis and conclusion of the converse of the given conditional. conclusion: this had not been an actual emergency hypothesis: the attention signal you just heard would not have been followed by official information, news, or instruction Ifthe attention signal you just heard wouldnothave been followed by official information, news, or instruction, thenthis hadnotbeen an actual emergency. Note: The contrapositive of p → q is ~ q → ~ p.

11. 2.1 Assignment page 83-86 even {2-32, 48-51, omit 20,22} Identify the hypothesis and conclusion of each conditional. 2. If you want to be fit, then you want to get plenty of excise. 4. “If you can see the magic in a fairy tale, you can face the future,” 6. “If you can accept defeat and open your pay envelope without feeling guilty, your stealing.”--George Allen, former NFL coach 8. “…if I could paint that flower in a huge scale, you could not ignore its beauty.”--Georgia O’Keeffe, artist Write each statement as a conditional. {if-then} 10. 3x-7=14 implies that 3x=21. 12. All obtuse angles have measure greater than 90o. 14. Two skew lines do not lie in the same plane. Show that each conditional is false by giving a counterexample. 16. Odd integers less than 10 are prime. 18. If you play sports with a ball and bat, then you play baseball.

12. 2.1 Assignment page 83-86 even {2-32, 48-51, omit 20,22} Write the converse of each conditional. {switch the hyp with conclusion} 24. If a triangle is a right triangle, then it has a 900 angle. 26. If you do not work, then you do not get paid. Write the converse, then determine if the conditional and converse are true or false. 28. If a point is in the first quadrant, then its coordinates are positive. 30. If the probability that an event will occur is 1, then the event is certain to occur. 32. If two angles has a measure 900, then the angles are congruent. Write the words for the symbolic ststements shown. Determine the truth value of the statement. If false, provide a counterexample. p: A figure is square. q: A figure has four congruent angles. r; A figure has four congruent sides 48. p q 49.q p 50. r q 51. (q and r) p

13. 2.1 Assignment page 83-86 even {Omit 20,22 Identify the hypothesis and conclusion of each conditional. 2. If you want to be fit, then you want to get plenty of excise. 4. “If you can see the magic in a fairy tale, you can face the future,” 6. “If you can accept defeat and open your pay envelope without feeling guilty, your stealing.”--George Allen, former NFL coach 8. “…if I could paint that flower in a huge scale, you could not ignore its beauty.”--Georgia O’Keeffe, artist Write each statement as a conditional. {if-then} 10. If 3x-7=14 , then 3x=21. 12. If you have an obtuse angles , then the measure is greater than 90o. 14. If you have two skew lines, then they do not lie in the same plane. Show that each conditional is false by giving a counterexample. 16. 4, 6, 8, 9 18. softball

14. Geometry 2.1 Conditional Statements Identify the hypothesis and conclusion of each conditional. 2. If you want to be fit, then you want to get plenty of excise. 4. “If you can see the magic in a fairy tale, you can face the future,” 6. “If you can accept defeat and open your pay envelope without feeling guilty, your stealing.”--George Allen, former NFL coach 8. “…if I could paint that flower in a huge scale, you could not ignore its beauty.”--Georgia O’Keeffe, artist Write each statement as a conditional. {if-then} 10. If 3x-7=14 , then 3x=21. 12. If you have an obtuse angles , then the measure is greater than 90o. 14. If you have two skew lines, then they do not lie in the same plane. Show that each conditional is false by giving a counterexample. 16. 4, 6, 8, 9 18. softball