Answer:
A. Concentration gradient must exist.
Step-by-step explanation:
It’s 3 because (x,y) & your coordinates were (3,5) so x is 3. x stays the same, hope this helps
Answer:
Erin ran 12.5 miles
Luis ran 7.5
In all they ran 20 miles.
Step-by-step explanation:
Erin: 5 x 3.5 = ?
Luis: 3 x 2.5 = ?
----------------------------
5 x 2.5 = 12.5 . Erin ran 12.5 miles
3 x 2.5 = 7.5 . Luis ran 7.5 miles
7.5 + 12.5 = 20 miles
They ran 20 miles all together.
Hope this helps!
4 times 3 is 12
2 times 6 is 12
You can try to use the internet for the answer to some of those questions.