PLEASE HELP QUICKKK When JKLM is reflected across the y-axis, what will be the coordinates of the vertices of the image parallelogram?
A: J'(1, 5), K'(4, 4), L'(4, 2), M'(1,3)
B: J'(5, 1), K'(4,4), L'(2, 4), M'(3, 1)
C: J'(5, -1), K'(4,-4), L'(2,-4), M'(3, -1)
D: '(-5, -1), K'(-4,-4), L'(-2,-4), M'(-3,-1)

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)