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A stone falls from the high bridge and reaches the ground in 10 sec, then height of bridge is approximately __________ (a) 590m (b) 460m (c) 500m (d) 1000m the object falling has an acceleration due to gravity of 9.8m/s^2 and it reaches the ground in 10 secs so the using the formula...

please i need more help can any 1 solve this equations my textbook has a solution set {(-1,3),(-13,11)} please help me I'd be thankful to you.

2x+3y = 7, -> equation1 2x^2-3y^2 = -25; -> equation2 first of all tell me the type of equations first i solve for y equation 1 y = (-2x +7)/3 now what should i do ?