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## Robert Kaplinsky ## Equations of Perpendicular Lines

Directions: Using the digits 1 to 9 at most one time each, fill in the blanks to create two distinct perpendicular lines.  Note that the coefficient for the second line’s y is negative. __ x + __ y = __ __ x + -__ y = __ Source: Bryan Anderson

## Equations of Parallel Lines

Directions: Using the digits 1 to 9 at most one time each, fill in the blanks to create two distinct parallel lines. __ x + __ y = __ __ x + __ y = __ Source: Bryan Anderson

## Equidistant Points 2

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to create two points that are equidistant from (4,-1). Source: Bryan Anderson

## Making Change 2

Directions: Make 47¢ using exactly 6 coins with either quarters, dimes, nickels, or pennies. Source: Thad Domina and Robert Kaplinsky

## Making Change

Directions: Make 47¢ in three different ways with either quarters, dimes, nickels, or pennies. Source: Thad Domina and Robert Kaplinsky

Directions: What is a radius for a circle that has an area of 20 to 25 square feet? Source: Nathan Charlton

## Equilateral Triangle Side Length

Directions: What is the side length of an equilateral triangle that has an area of 5 square units? Source: Robert Kaplinsky

## Rectangular Prism Surface Area Versus Volume

Directions: What is least amount of surface area possible on a rectangular prism with a volume of 64 cubic inches? Source: Robert Kaplinsky