exam Maths Puzzle Numerical Ability

Solve.
0.5x + 6 <_ 1.3x - 3

HELP PLEASE!! WIll someone help.

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exam Other Question

I need help with proof

Given: Segement RT is perpendicular to plane P; Segment RK = segment RZ
Prove: Triangle KTZ is isosceles

Picture is a plane with a triangular prism si
Solve the system by graphing.

x + y = 3
x + y = -1