The distance between city A and city B is 600km. The first train left A and headed towards B at the speed of 60km/hour. The second train left B heading towards A three hours after the first train left A, and it traveled with a speed of v km/hour. The trains met T hours after the time at which the first train left A. Express v in terms of t. Find the speed v if t=7; t=6

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step-by-step explanation:

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

not sure but it may be b, as i said i'm not sure.

b) k’(6, 4); l’(3, 3)

step-by-step explanation:

a 270° clockwise rotation maps every point (x, y) to (y, -x). (it negates the x-coordinate and then switches it and the y-coordinate.)

this means the endpoints of the side congruent to kl, k' and l', would be mapped as:

k'(-4, 6)→(6, 4)

l'(-3, 3)→(3, 3)