The lengths of the sides of a triangle are 6, 7, and 9. find the longest side of a similar triangle whose shortest side is 4.

find ratio of the 2 shortest sides 4 & 6

4/6 = 2/3 = 0.666666

 them multiply longest side by that so 9 * 2/3= 6

 so longest side is 6

the battle of gettysburg is considered the "high water mark" of the confederacy because it marked the greatest advance of the confederate forces against the union.

step by step explanation: when u removing the parentheses and combined them that would be : x+3y-x-y=2y