4/4 Stella has some cards. Then she makes 13 more cards. Now she has 41 cards. O How many cards does Sel start with? DDD DDODU Show your work. 13 םA םט 13 41 Solution Write and solve a problem Tike Problem 5. Use different numbers. 13 13

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A: 1

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A: Option b is correct . Please see below for solution

Q: 28. For all integers a, b, and c, if a bc then a b or a c.

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Q: Which formula is not equivalent to the other two? 3 a. E(k - 1)2 b. E (k + 1)2 c. Ek2 k=1 k=-1 k=-3

A: we know that…

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Q: Solve the given expression. 5.) C(9,2) 3.) P(12,4) 6.) C(15, 4)

A: We use formula  C( n, r ) = n! /( n! ( n - r )!) P( n,r ) = n! /( n -r )!

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Set Theory

Every field in the present world involves a set. The theory of sets was developed by German mathematician Georg Cantor while working on the “problems of trigonometric series”.