Which system of equations models the paths of the two skaters? y = 0.08x2-1.6x+13 and y = 0.08(x-10)2+5

y = 0.08x2-1.6x+13 and y = 1.6(x-10)2+5

y = 0.08x2-1.6x+13 and y = 0.8(x-10)2+5

y = 0.08x2-1.6x+13 and y = 5(x-10)2+5

Pls! does anybody know a shortcut for answering these types of questions in the future?

In the diagram below,abc is congruent to dec what is the value of x

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.71 with a standard deviation of $0.10. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.41 and $4.01? round your answer to one decimal place.