A tree with a height of 8 ft casts a shadow 14 feet long on the ground. How high is another tree that casts a shadow which is 21 feet long?​

Examine this system of equations. what integer should the second equation be multiplied by so that when the two equations are added together, the x term is eliminated? 3/4x+1/7y=6 1/8x-3/5y=16

Me i'm timed right now! a. (0,-5)b. (0,-3)c. (0,3) d. (0,5)

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?