What is the value of x?

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( hurry)

Step-by-step explanation:

The whole triangle and small triangle are similar (AA). Therefore the sides are in proportion:

         cross multiply

      use distributive property

           subtract 220 from both sides

         divide both sides by 55

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.