Question

Use a truth table to test the validity of the following argument.

If you are on the student council,then you must maintain at least a B average.
You are not on the student council.
Therefore, you do not maintain a B average.

Valid or invalid?

Answer 1

where’s the truth table test ?

Answer 2

Reasoning and Proof Unit Test

Explanation:

1. 67

2. counterexample

3. If you join the gym, then it is free for the first three months.

Hypothesis: you join the gym

Conclusion: it is free for the first three months

4. Yes; two lines intersect at right angles if (and only if) they are perpendicular

5. An angle is obtuse if and only if its measure is greater than 180

6. Symmetric Property

7. 12

8. RT-ST

9. x=8, y=9

10. 7

11. Symmetric Property

12. invalid

13. A. is Substitution Property of Equality, B. is Supplementary Angles, C. is Subtraction Property of Equality

14. (A) 180, (B) 180, (C) transitive property, (D) 3, (E) 3

15. The value of x is 3.

a) Addition of line segments

b) Substitution rule

c) Simplification by addition of like terms

d) Collecting lie terms

e) Dividing both sides by 8

AB = 2x

BC = 6x + 8

AC = 32

AB + BC = AC (Addition rule)

Addition of the component segments of a line

2x + 6x + 8 = 32 (Substitution rule)

Substituting for AB, BC, and AC in the equation AB + BC = AC

8x + 8 = 32 (Simplification)

Simplifying 2x + 6x + 8 = 32 by adding like terms

8x = 24 (Collecting like terms)

8x = 32 - 8

8x = 24

x = 3 (Divide both sides by 8)

8x / 8 = 24/8

x = 3

16. If it is square it is a Quadrilateral.

17. 7y = 8x - 14

7(6) = 8x - 14

Collect like terms.

42 = 8x - 14.

8x = 42 + 14

8x = 56

x = 56/8

x = 7

These are all the correct answers as of 2022