Answer:
C) 4x^2 + 13x - 35
Step-by-step explanation:
(4x-7)(x+5)
4x × x + 4x × 5 - 7x - 7 × 5
4x^2 + 20x - 7x - 35
4x^2 + 13x - 35
4x2+13x-35
hope this helps
The length of the triangle is 3x given
The no of sides is 3x 3x 3x so 3x+3x+3x= 180
9x=180 x= 20
3x =3*20=60
3x=3*20=60
