Question

If f(x)=6x-15 and f(a)=30, what is the value of a? Please help

Answer 1

Answer:

$a=7.5$

Step-by-step explanation:

Given the function $f(x)=6x-15$ and the output $30$ when $x=a$, we can write the equation:

$6a-15=30$

$6a=45$

$a=7.5$

We can insert the value of $a$ into the function to verify the output equals $30$:

$f(a) = 6a-15$

$= 6(7.5)-15$

$=30$

∴ We have verified that $a=7.5$

Hope this helps :)