Evaluate the function for x = 2: f(x)=7x-5
a. 9
b. 19
c. -9
d. -19

i'm completely lost

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Which statement about perfect cubes is true

Use the expression below.–4b + 8c + 12 – 8b – 2c + 6part asimplify the expression. enter your answers in the boxes. b + c + part bfactor the simplified expression using the gcf. a. 2(–2b + c + 3) b. 3(–2b + c + 3) c. 4(–2b + c + 3) d. 6(–2b + c + 3)part cwhat is the value of the expression when b = 2 and c = –3? enter your answer in the box.