Please help me with these questions.?

13.The length of one leg of a right triangle is 30 and the length of the other leg is 40. What is the length of the hypotenuse?





20. A shoe store has a sale. If shoppers buy one pair of shoes, then they can buy a second pair of shoes at half the cost. Two friends purchase two pairs of shoes together during the sale and paid 8.25 % tax on the sale price. If both pairs separately would have cost $24 each, what is the approximate total amount that each friend paid if they split the cost equally?





23.The trinomial x^2 – 10x + 16 represents the area of a rectangle. Factor this expression to find algebraic representations for the length and width of the rectangle.





26.Rick has a pattern for a triangular kite with a base of 54.2 inches and a height of 27.8 inches. Approximately how much material will Rick need to make the kite?





32.Kelly used the scale 1 centimeter = 4 meters to plan a design for her backyard. The drawing of her patio is 4.5 centimeters long. What is the actual length of her patio?

Please help me with these questions.?
13. 30^2 + 40^2 = Hyp^2


Hyp^2 = 2500 =%26gt; hypotenuse = 50





20. the price paid is: 24 + 24/2 + (24 + 24/2)* 8.25/100 = 38.97 $


each one will pay = 38.97/2 = 19.485 $





23. x^2 - 10x + 16 = x^2 - 10x + 25 - 25 + 16


= (x - 5)^2 - 9


= (x - 5 - 3)(x - 5 + 3)


= (x-5)(x-2)





32. 4.5*4 = 18 m
Reply:The most basic questions:


13. a^2+b^2=c^2


so 30^2+40^2=c^2


c=50(c%26gt;0)





20. 24+24/2=$36


36*(1+8.25%)=$38.97


38.97/2=$19.485


so $19.49





23. (x-8)(x-2)


so length=x-2, width=x-8





26. 54.2*27.8*1/2=753.38





32. 4.5*4=18m (1cm represents 4m so 4.5cm represents 4.5*4m)
Reply:Thats a 3, 4, 5 right triangle, so its 50





20. (x + 1/2 x)( 1.0825) = 24 crank out x





23. A triangle area = 1/2 bh general statement


x 2 -10x +16= 1/2 hx crank out for h and x





24 just multily out A= 1/2 bh thats the answer





32 just multiply it out 4 times 4.5 = 18 Meters
Reply:You have to understand these are the most basic trig questions there are. You would be much better off figuring these out for yourself -





a^2 + b^2 = c^2


1/2 b*h = area


They are so basic, any other hints will give you the answer.
Reply:13. hypotenuse = sqrt (30^2 + 40^2) = 50 (Pythagorean triple also)


20. total cost = (24 + 24/2)(1.0825) = 38.97


split = 38.97/2 = 19.48 or 19.49


23, factored = (x-8) (x-2) represents length and width


26. If it is a triangle and not a kite shape, then


A = 1/2 bh or 1/2 *54.2 * 27.8 = 753.38 inches square


32. 4.5 * 4 = 18 meters


35. don't understand your notation of the question.


36. 2985 * 1.79 = 5343.15 g or 5.34315 kg



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