Brad is working on a speed problem in physics class. the problem tells him that a girl runs from her house to the park 0.05 km away in 10 s. brad calculates that her speed is 0.005 m/s. is he correct? if not, explain the flaw or flaws in his problem solving process.

Brad is incorrect.

0.05 k m  =  0.05  ⋅  1000 m  =  50 m

s  =  d/ t

where  d  is distance in metres  (m) ,

and t is time in seconds.

and s is speed in meters per second m/s

d  =  50 m   and  t  =  10 s

50m/10s

s = 5 m/s

Brad did most everything correctly just that the number would need to be multiplied by  1000  since the unit  k m  was converted to  m .

a variable is any characteristics, number, or quantity that can be measured or counted. a variable may also be called a data item. hope i !

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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