7. (Chapter 9, #12) Prove or disprove: If a, b, c e N, and ab, bc and ac all have the same parity, then a, b and c all have the same parity.

Q: 1) Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 in the circles below so that the sum of the numbers…

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Q: If a,b ∈ Z and a and b have the same parity, then 3a + 7 and 7b - 4 do not.

A: let a and b are integers and a and b have the same parity therefore either they are both even or…

Q: 1) V16 2) VT - Vī 3) V27 V27 4) 5) V16 Vī 6) V81 7) -V16 – V-8

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Q: (Type an integer or decimal rounded to four decimal places as needed.) (e) What is the probability…

A: It is given asμ = -0.05σ = 5.76n = 140

Q: 3. Evaluate. Expres a) 12° ) 6-2 e) 500-1 g) (-2)-8 -2 i) k) - Use a pattern to sl

A: 3.) a) 120=1 this whole number b) 8-1=18 this is a fraction c)  6-2=162     =136

Q: If a(3, 4) – b(2, 4) = (8, 10), determine a and b.

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Q: Show that if ax2 + bx + c = 0 for all x, then a = b = c =0

A: It is given that, ax2+bx+c=0 for all x,  To prove a = b = c = 0

Q: 5 C2n-5 a. n-1 250 Σ b. c. 5.

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Q: a) Is 0/5 defined or not? Write a word problem for 0/5, and use your problem to discuss whether or…

A: In this question ask that is 0/5 is defined or not. And second is is 5/0 is defined or not.

Q: 10. Let a = (1,-1,2), b = (2,0,−1), and = (3,-2,0). Evaluate or explain why the expression is…

A: The vectors:

Q: What conditions, if any, must be set forth in order for a + b to be equal to n(A U B)?

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Q: 1. There are two boxes, each of which contains a certain number of cubes and balls, painted in…

A: Given:   Box 1 Box 2   Red Blue Red Blue Cube 6 24 28 42 Ball 14 56 12 18 Total 20 80 40…

Q: 7.) Tomas practiced the piano 3 hours less than twice as many hours as David practiced. Let d…

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Q: 19. TWO OF A KIND: Two cards with the same denomination and three cards with other denominations…

A: We have to find given probabaility.

Q: 5. If Ā= 2 4 If A and B -2 3) find: 5 7 (a) AB (b) Ã+E (c) 2A" - E (d) a" (A- E)

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Q: 4) - 3 8 (33) A) 4 B) {-1} C) {-2} D) {1}

A: First we will cross multiply to given fraction a-63=688(a-6)=6(3)8a-48=18

Q: 9. Colony X started with 50 bacteria and tripled every hour. Colony Y started with 20 bacteria and…

A: X colony can be represented by50×(3)x  where x is the number of hoursY colony is represented…

Q: 14) A(3,-1), B(1,-2), C(5, -1), A (2₁-6), AB. CA = ?

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Q: 3. Prove or disprove [yes, these should look familiar from §2.3]: (a) The sum of three consecutive…

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Q: 19. There are 51 students at a school. Each student must least a one course in Algebra (A), Biology…

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