If f(x) = 7x-19
then f(4)=?

9

Step-by-step explanation:

given

f(x) = 7x - 19

f(4) = 7 * 4 - 19

= 28 - 19

= 9

Numerical expressions contain numbers, while algebraic expressions contain variables and numbers.

Numerical Expression

"Difference" indicates that we'll be subtracting 13 from 48.

48 - 13 = 35

Algebraic Expression

Variables represent the unknown number, in this case the difference between 48 and 13. Let d represent the difference between the two.

48 - 13 = d

35 = d