Answer:
{x, y, z} = {-4, 2, 4}
<u>i think this is the answer</u>
4 ounces are left because 3/4 of 20 is 5. And 1/5 of 5 is 4. I hope this helps
We assume you intend

You want to evaluate this function for h=0 and h=8.

The amount injected was 35 milligrams; 8 hours later 10.54 milligrams remained.
Let the 2 integers be
x and
y.
Their product is 72, so we write:
xy=72. (I)
One of them, say
y, is 2 less than 5 times the other. We can write this as the equation:
y=5x-2. (II)
To find one of numbers, say x, we can substitute y with 5x-2, in the first equation:
xy=72,

expanding the left hand side expression we get:

.
Answer: C