exam Maths Puzzle Numerical Ability

How would you evaluate this expression?

4 with an exponent of -2 minus 4 with an exponent of -1

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exam Other Question

We are struggling with these problems. Thank you
Find the variation constant and an equation of variation where y varies directly as x and y=80 when x=10.

The variation constant is K=_____
The equation of variation is y=_____ The product of two odd Intergers is 143. Write an equation whose solution is one of the Intergers. Use Factoring to solve the equation and find both Intergers.