Question

A function has the rule "multiply by two, and then subtract three." What is the output when the input is 8?

ten

thirteen

eighteen

twenty-two

Answer 1

\[f(x)=2x - 3\]

Answer 2

if you hence input 8 to where x is:
\[f(8) = 2(8) - 3\]

Answer 3

so now you can compute 2(8) - 3.

Answer 4

do you understand this?

Answer 5

i really dont this kinda questions confuse me

Answer 6

wait do i distibute the 2 then subtract the 3

Answer 7

no. the parenthesis is another way to show multiplication. but it means the same thing as:
\[2 \times 8 - 3\]

but what i did was replace the x to 8, to get the y (output), which is basically the answer to the expression

Answer 8

thats what i meant distribute the 2 to the 8 then subtract so the answer would be 13

Answer 9

okay. sorry for misunderstanding what you said. but anyways, your answer is correct

Answer 10

thank you for your help :)

Answer 11

no problem