Will give brainlist asap

x=22

Step-by-step explanation: all the angles in a triangle equal 180 degrees. This becomes 5x+70=180. Simplify the equation it becomes 5x=110. divide by five it becomes x=22

$30.32

step-by-step explanation:

65.00*.12=2.80

65.00-2.80=57.20

57.20*1.06=60.632

60.632/2=30.316

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.