9. Bob climbed down a ladder from his roof, while Roy climbed up another ladder next to him. Each ladder had 30 rungs. Their friend Jill recorded the following information about Bob and Roy: Bob went down 2 rungs every second. Roy went up 1 rung every second. At some point, Bob and Roy were at the same height. Which rung were they on? a. Write let statements for the unknowns in the problem (time and the ladder rung) let x be let y be B. Write an equation for Bob and and equation for Roy Bob: Roy: C. Solve the system using substitution

9. Bob climbed down a ladder from his roof, while Roy climbed up another ladder next to him. Each ladder had 30 rungs. Their friend Jill recorded the following information about Bob and Roy: Bob went down 2 rungs every second. Roy went up 1 rung every second. At some point, Bob and Roy were at the same height. Which rung were they on? a. Write let statements for the unknowns in the problem (time and the ladder rung) let x be let y be B. Write an equation for Bob and and equation for Roy Bob: Roy: C. Solve the system using substitution

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Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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Concept explainers

Permutations and Combinations

If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.

Counting Theory

The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.

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Question

9. Bob climbed down a ladder from his roof, while Roy climbed up another ladder next to him. Each
ladder had 30 rungs. Their friend Jill recorded the following information about Bob and Roy:
Bob went down 2 rungs every second.
Roy went up 1 rung every second.
At some point, Bob and Roy were at the same height. Which rung were they on?
a. Write let statements for the unknowns in the problem (time and the ladder rung)
let x be
let y be
B. Write an equation for Bob and and equation for Roy
Bob:
Roy:
C. Solve the system using substitution
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