exam
Maths Puzzle
Numerical Ability
9g + 7h = 9g - 7h + g
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exam Other Question
verify the identity
sin(a+B)sin(a-B)= cos^2B-cos^2a
Don't know how to make the correct symbols...sorry.
YOLANDA IS MAKING STAICASE SHAPES BY USING SQUARE TILES.HOW MANY TILES WILL SHE NEED TO MAKE A STAIRCASE THAT IS 10 TILES TALL?