Find x and what type of angle is this?

a)  x = 12

b) right triangle

Step-by-step explanation:

a) 2x + 1 + 5x + 5 + 90 = 180

    7x + 96 = 180

    180 - 96 = 84

     84 / 7  = 12

          x = 12

b) you can tell that it is a right triangle because of the square in the corner that indicates it is a right triangle

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problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !