Answer:
13. 13 or 17 (not sure about this, sorry)
14. 28
Step-by-step explanation:
13.

if counting the sequence from
then
is 17, but if

counting from
, then
is 13.
14.

Awnser is below in the photo
The mapping is not a function
Answer:1)5x^2-11x
2) x^2-3x
Step-by-step explanation:
1)(f+g)(x)
f(x)=3x-7
g(x)= 2x-4
[(3x-7)+(2x-4)](x)
3x^2-7x+2x6^2-4x
=<u>5x^2-11x</u>
2) (f-g)(x)
[(3x-7)-(2x-4)](x)
(3x-7-2x+4)(x)
3x^2-7x-2x^2+4x
x^2-3x
2*l*w+2*l*h+2*w*h plug in then solve