Subtract the polynomials (4x^ - 3x + 8) - (2x^ + 2x - 5)

2x^2-5x+13

Step-by-step explanation:

(4x^2-3x+8)-(2x^2+2x-5)

4x^2-2x^2-3x-2x+8-(-5)

2x^2-5x+8+5

2x^2-5x+13

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1