## iwanttogotostanford one year ago HELP WITH ACT PRACTICE QUESTION: if f(x)=x^2+x+5 and g(x) = sqrroot x, then what is the value of g(4)/f(1) ?

1. freckles

enter 1 into the expression named f enter 4 into the expression named g

2. iwanttogotostanford

why?? I'm doing a practice test and i got this one wrong so i don't need the answer as much just how to do the problem!:-)

3. dinamix

2/7

4. iwanttogotostanford

@dinamix @freckles can you explain why?

5. freckles

have you entered 1 into the expression named f yet?

6. iwanttogotostanford

@freckles yes

7. freckles

f(x)=x^2+x+5 replace x with 1 g(x)=sqrt(x) replace x with 4

8. freckles

what do you get when you evaluate x^2+x+5 for x=1 and what do you get when you evaluate sqrt(x) for x=4?

9. iwanttogotostanford

7 and 2

10. freckles

correct $\frac{g(4)}{f(1)}=\frac{\sqrt{4}}{1^2+1+5}=\frac{2}{7}$

11. dinamix

that correct @iwanttogotostanford

12. iwanttogotostanford

ok thanks that wasn't so hard I guess