OpenStudy (anonymous):

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

3 years ago
OpenStudy (calculusxy):

$f(x)=2x - 3$

3 years ago
OpenStudy (calculusxy):

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

3 years ago
OpenStudy (calculusxy):

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

3 years ago
OpenStudy (calculusxy):

do you understand this?

3 years ago
OpenStudy (anonymous):

i really dont this kinda questions confuse me

3 years ago
OpenStudy (anonymous):

wait do i distibute the 2 then subtract the 3

3 years ago
OpenStudy (calculusxy):

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

3 years ago
OpenStudy (anonymous):

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

3 years ago
OpenStudy (calculusxy):

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

3 years ago
OpenStudy (anonymous):

thank you for your help :)

3 years ago
OpenStudy (calculusxy):

no problem

3 years ago