Answer:
≥
Step-by-step explanation:
First, let me clarify what the inequality expressions are and what they signify.
≥ means greater than or equal too
≤ means less than or equal too
< means less than
> means greater than
The text says students in middle school must be 10 years <em>or older. </em>That gives me a clue that students in middle must be either 10 years old, or older than ten years old. Greater than 10, or equal to ten. The inequality symbol that compliments that is the greater than or equal to symbol, ≥. So, the inequality symbol that goes with the text is the greater than or equal to sign, ≥.
Answer:
A) 20ml
Step-by-step explanation:
You have a 2.5% solution (in 100 of the solution you have 2.5 of solvent), then if the dose that is being supplied to the cat is 5mg / kg it means:
if 1000 gr is equivalent to 100%
5 gr is equivalent to X;
X= (100%*5gr)/1000gr → X= 0.5%, , Therefore the amount of milliliters that should be supplied of 2.5% is:
if 100ml hava a concentration of 2.5, how many mililiters are necesary in a concentration 0.5
X=(0.5%*100ml)/2.5% → X=20ml
Let's call the numbers x and y:
their sum is:
x+y=30
and their difference is x-y=12.
from the first equation: x=30-y
and we insert this into the second equation:
30-y-y=12.
we calculate:
30-2y=12
30-12=2y
18=2y
9=y
so the first number is 9 and the second is 30-9=21.
Answer:
$1,500
Step-by-step explanation:
I did the test and it showed me the answer.
Your correct answer is c.