*BRAINIEST & 25 POINTS*

m<R = 65

Step-by-step explanation:

m<R + m<S + m<T = 180° (sum of interior angles in a triangle)

(5x - 11) + (3x - 3) + (3x + 18) = 180°

Solve for x.

5x - 11 + 3x - 3 + 3x + 18 = 180

Add like terms

11x + 4 = 180

11x = 180 - 4

11x = 176

x = 16

m<R = (5x - 11)

Plug in the value of x

m<R = 5(13) - 11

m<R = 65

your answer is 23/2 - 13.5

step-by-step explanation:

7/2 evaluates to

multiply x and 4.5

multiply x and 1

the x just gets copied along.

the answer is x

x

4.5*x evaluates to 4.5x

multiply 3 and 4.5x

multiply 1 and x

the x just gets copied along.

x

4.5*x*3 evaluates to 13.5x

7/2-4.5*x*3 evaluates to

  + 8 =

the answer is

7/2-4.5*x*3+8 evaluates to

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.