exam Maths Puzzle Numerical Ability

if y varies directly with x, and y=44 when x=4 find the constant of variation k

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exam Other Question

If a license plate does not contain any vowels (A, E, I, O, U) or the number 5. How many different possibilities outcomes for the license plate? Solve each system by substitution method. Indicate whether each system is independent, inconsistent or dependent.
3y=y+5
3x-9y= -10

and

x=1/8y-1
y=1/4x +39