Solve similar triangles (advanced)

Step-by-step explanation:

The two triangles given that are similar are

EDA and CBA

From this one fact, we get the following proportion.

ED/CB = (x + 8) / x                 Substitute for the line lengths

13/7 = (x + 8)/x                        Cross Multiply

13x = 7(x + 8)                           Remove the brackets

13x = 7x + 56                          Subtract 7x from both sides

13x - 7x = 56

6x = 56                                   Divide both sides by 6

x = 56/6

x = 9.33

  x = 9 1/3

Step-by-step explanation:

If we draw line CG that is parallel to AD so it intersects DE at G, it will divide segment DE into DG = 7 units and GE = 6 units. The resulting triangle CGE is similar to triangle ABC. Of course, CG = BD = 8.

  AB/CG = CG/GE

  x/7 = 8/6

  x = 7(8/6) = 7(4/3) = 28/3 . . . . multiply by 7 and reduce the fraction

  x = 9 1/3

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: