exam Maths Puzzle Numerical Ability

use coordinate geometry to prove that the diagonals of a square are perpendicular.

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exam Other Question

Can someone please help me with this graph
GRAPH THE INEQUALITY
X<-2

THANKS I need help again with another problem. setting up an equation and solving by factoring. thank you

problem:
Yolanda's rectangular living room is 2ft longer than it is wide, and