Diameter is radius plus radius so its 14. Circumference is radius times pi which is 3. 14 so the answer for Circumference is 43.98.
Area is 153.94 the formula is A= nr to the power of two
I’m pretty sure it’s (x-7)(x+6)
to factor you need it to multiply to -42 and add to -1 which gives you -7 and 6
It would be c because you would subtract 13 on both side and the equation would be x - 13 = 16
