How many counterexamples do you need to prove a conjecture to be false

Carlos bought an item online for $160 and he was charged an $8 fee for shipping. What percent of the sale price was the shipping fee?

a circular swimming pool has a radius of 15 ft. There is all away around the pool thats is 3 ft wide. what is the circumference of the outer edge of the pool

You decide to build a sidewalk from your house to your garage. In order to do this, you must make the dog pen smaller. Dog Pen Garage Original Dog Pen 1. The original dog pen covered an area of 24 m 2.

What's greater - 3 or - 4

For f (x) = 3x-1, find f (x) when x=2

Simplify this - 6r• (12s)

Suppose you take an 80 question mc test with 5 choices if 60% is passing, what are your chances of passing

What is the 14th term of the arithmetic sequence with a first term of 7 and a common difference of 10?

Mrs Naidu bought $155 in groceries. she paid her bill with $5 and $20 notes using a total of 13 notes. calculate how many of each type of each type of note were used.

At the mall Greg purchased three CDs which cost $10.68 each if Greg has $79 in his wallet before the purchase how much money is left in his wallet