exam Maths Puzzle Numerical Ability

A party of 8 people ordered a large round pizza. The waiter a real show-off divided it into 8 equal pieces with only 3 straight cuts of the knife. How did he do this?

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exam Other Question

Find the slope and the y-intercept.
y = 7x - 7

Thanks so much!!!! I am stuck with this problem. Please help.

The length of one of the equal legs of an isosceles triangle is 8cm less than 4 times the length of the base. If the perimeter is 29cm, find the lengths of the equal legs.