exam Maths Puzzle Numerical Ability

how do i simplify the following; 2x^6 -6x^4 +4x^3 / 2x^5

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exam Other Question

find the slope and the y-intercept.
y=4x-3 Can I please get some help?

One card is selected at random from a standard 52-card deck of playing cards. Find the probability that the card selected is a red king. (Give solution as a fraction in lowest terms.)