1 point If f(x) = 5x - 4 and F(4a) = 80, then what is
the value of a ?
4.2
2
4.
3.8

a = 4.2

Step-by-step explanation:

Given that,

f(x) = 5x-4 ...(1)

f(4a) = 80

We need to find the value of a.

Put x = 4a in equation (1) and equate with 80. So,

5(4a)-4=80

Adding 4 both sides,

20a-4+4=80+4

20a=84

⇒ a = 4.2

So, the value of a is 4.2. Hence, the correct option is (a).

thank

Step-by-step explanation:

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