The answer is 44 chickens and 28 rabbits.
We have a system of two equations.
x - the number of rabbits
y - the number of chickens
Both chicken and rabbit have only 1 head, so the first equation is: x + y = 72.
Since rabbits have 4 legs and chickens 2 legs, the second equation is: 4x + 2y = 200.
Now, let's solve the system:
x + y = 72
4x + 2y = 200
___________
y = 72 - x
⇒ 4x + 2 · (72 - x) = 200
4x + 2 · 72 - 2 · x = 200
4x + 144 - 2x = 200
2x + 144 = 200
2x = 200 - 144
2x = 56
⇒ x = 56 ÷ 2 = 28
So, there are 28 rabbits.
Since
y = 72 - x = 72 - 28 = 44,
there are 44 chickens.
Answer:
b. thrive during the summer, when sunlight increases
Explanation:
Phytoplankton production is highly associated with latitude and season. In polar regions, phytoplankton production is reduced to the summer (and eventually spring) season. In consequence, the zooplankton that eats phytoplankton only can survive during the spring and summer seasons. On the other hand, in tropical areas, there exists a nearly constant phytoplankton production all year round.
Answer:
All of the following are possible EXCEPT
a voluntary decrease in the rate of breathing.
Explanation:
A voluntary does not decrease in the rate of breathing
tandem repeat is a microsatellite with repeat units that are 2 to 7 base pairs in length, with the number of repeats varying among individuals, making STRs effective for human identification purposes
Explanation:
The correct answer of the given question above is option A. The line of defense that his immune system is exhibiting in this situation is the first line of defense. The first line of defense includes the physical or external line of defense of the body that are responsible for inhibiting of the entry of foreign microorganisms. Such include the skin, tears, cilia, mucus, urine flow and even stomach acid.
