exam Maths Puzzle Numerical Ability

Hello, can anyone help me with this?

Solve the following system by graphing.

x + y = 6
x - y = 3

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exam Other Question

CAN YOU TELL ME IF 25 IS A RATIONAL NUMBER For a test of 8 true/false questions, Maria was curious about the following if she would answer every question by guessing. Determine
A) The probability of getting the first three