Question

[1.06] Derrick charges a flat rate of $10 for babysitting, plus an additional $4 per hour. If "h" represents the number of hours he babysits, which algebraic expression represents the total charge?

10 + 4h

10h + 4

14h

40h

Answer 1

it's 10+4h

Answer 2

4H plus 10

Answer 3

flat rate of $10 for babysitting, plus an additional $4 per hour

you have to translate English into "math"

start by throwing out some of the words

flat rate $10 plus $4 per hour
hopefully you know plus translates to +
flat rate $10 + $4 per hour

$4 per hour can be shortened to $4 times number of hours. (you get $4 for 1 hr, $8 for 2 hrs, ...)
so this is
flat rate $10 +$4 * hours
replace hours with h
flat rate $10 + $4 h

now throw out flat rate, the $ signs
10 + 4h