exam Maths Puzzle Numerical Ability

CAN YOU TELL ME IF 25 IS A RATIONAL NUMBER

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exam Other Question

Solve for x:
(A.) Log(base 5)7 + log(base 5)8 = log(base 5)(2x-4)

(B.) Log(base 3) (x+1) - log(base 3) x = log(base 3) 15

(C.) (3/4)log(base 10) 10,000 = x
Hello, can anyone help me with this?

Solve the following system by graphing.

x + y = 6
x - y = 3