Given the function f(x) = 3x + 5; What is the value of f(x)when x = -10?what is the value of (20)?what is the value of x when f(x)= 20?

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asked Jun 27, 2023 575 views

1 Answer

Bobajob · Answer 1 · 2023-07-01T05:19:10+0000

First let's find the value of f(x) when x = -10:

$\begin{gathered} f(x)=3x+5 \\ f(-10)=3\cdot(-10)+5 \\ f(-10)=-30+5 \\ f(-10)=-25 \end{gathered}$

Now, finding the value of f(20):

$\begin{gathered} f(20)=3\cdot20+5 \\ f(20)=60+5 \\ f(20)=65 \end{gathered}$

Finally, finding the value of x for f(x) = 20:

$\begin{gathered} 20=3x+5 \\ 3x=20-5 \\ 3x=15 \\ x=(15)/(3) \\ x=5 \end{gathered}$