Because You have to use the Elimination process to get rid of one of the variables and x is the simplest one so 16x-5y=-33 -16x+y=-51 Equals -6y=18 And now you have to get the y all by itself by dividing 18 by -6 which is -3 So -3 =y Then once you get there you have to take the negative three and place it in one of the y’s place I am going to use the second problem 16x+(-3)=-51 Now get the x by itself 16x-3=-51 +3 +3 16x=-48 ————- 16 x=3 And there you go
A^2 + b^2 = c^2....a and b are ur legs and c is ur hypotenuse 18^2 + 80^2 = c^2 324 + 6400 = c^2 6724 = c^2 sq rt 6724 = c 82 = c.....so the hypotenuse is 82 cm
