Use rules of implication, rules of replacement, conditional proofs and/or indirect proofs, to prove the arguments (or tautologies) valid. Be sure to justify every line you provide with both line numbers and the applicable rule. If you can't access the logical operation signs, just write "dot," "wedge", "horseshoe" or "triple bar" wherever applicable. 1. ( R ∨ S ) ⊃ ( T ⊃ K )
2. ~ K 3. R / ~ T

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

Question 3 (essay worth 10 points) (03.06 mc) part a: max rented a motorbike at $465 for 5 days. if he rents the same motorbike for a week, he has to pay a total rent of $625. write an equation in the standard form to represent the total rent (y) that max has to pay for renting the motorbike for x days. (4 points) part b: write the equation obtained in part a using function notation. (2 points) part c: describe the steps to graph the equation obtained above on the coordinate axes. mention the labels on the axes and the intervals. (4 points)

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor