Evaluate each expression. d = 5

e = 8

f = 10

1. e + f
2. f ÷ d
3. e + 7
4. 2d

1. 18

2. 2

3. 15

4. 10

(x+3)(x+7)

step-by-step explanation:

the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.