What is 9-3(2x-4) i have no idea what it is

PEMDAS. First, use the distributive property with -3(2x) + -3(-4) to get -6x + 12. Remember the 9, so you get 9 - 6x + 12. Now add 9 and 12 to get 21 - 6x.

The answer is 21 - 6x

You first do distributive property and multiply 3 by what's in the parenthesis  

3 * 2x = 6x + 3 * -4 = 12

Then 9 - 6x + 12

Which gives you 21 - 6x

huh? im pretty sure it is in 199

step-by-step explanation:

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.