What is the following sum?

4 (RootIndex 5 StartRoot x squared y EndRoot) + 3 (RootIndex 5 StartRoot x squared y EndRoot)
7 (RootIndex 10 StartRoot x squared y EndRoot)
7 (RootIndex 10 StartRoot x Superscript 4 Baseline y squared EndRoot)
7 (RootIndex 5 StartRoot x squared y EndRoot)
7 (RootIndex 5 StartRoot x Superscript 4 Baseline y squared EndRoot)

Which of the following expressions are equivalent ?

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125