Answer:
-2sqrt(3)) + 2(sqrt(15)
Step-by-step explanation:
sqrt(12) * (-1 + sqrt(5)) = -sqrt(12) + sqrt(12 * 5) = -sqrt(4 * 3) + sqrt(4 * 15) =
= -2sqrt(3)) + 2(sqrt(15)
Make the whole number what ever the whole number is over one
How long does she want to stay?
If you can chose put one of these
$8 for 5 hours ( flat rate)
$40 for 5 hours (hourly)
So, there are two equations.
5a + 3c = 30
a + c = 8, therefore, a = 8 - c
5a + 3c = 30
5(8 - c) + 3c = 30
40 - 5c + 3c = 30
-2c = -10
c = 5 , So a = 3