Question

If 3x−y=12, what is the value of 8x2y?

A) 212
B) 44
C) 82
D) The value cannot be determined from the information given.

Answer 1

here is ur ans ❤

Answer: I think your q is for 8^x/2^y

One approach is to express

8^x /2^y

so that the numerator and denominator are expressed with the same base. Since 2 and 8 are both powers of 2, substituting 23 for 8 in the numerator of  

8^x /2^y

gives

(2^3)^x /2^y

which can be rewritten

2^3x /2y

Since the numerator and denominator of have a common base, this expression can be rewritten as 2^(3x−y). In the question, it states that 3x−y=12, so one can substitute 12 for the exponent, 3x−y, which means that

8^x/ 2^y =212

The final answer is A.

hope it helps❤

Answer 2

Cellular respiration refers to a series of metabolic reactions that occur inside of a cell. The product of respiration is adenosine triphosphate (ATP), which is the molecule that our bodies use as energy. It is an exothermic oxidation/reduction reaction, which just means that it gives off heat.

In aerobic (with oxygen) respiration, there is a series of cycles and processes that occur almost simultaneously. Glycolysis occurs first, where a molecule of glucose gets broken down into four molecules of ATP, absorbing two for use later; the other two are products.

Occurring at the same time is the Krebs Cycle, otherwise known as the citric acid cycle, where carbon dioxide is created, as is reduced nicotinamide adenine dinucleotide (NADH), which is another energy molecule. Finally, oxidative phosphorylation occurs, which uses the NADH in the electron transport chain to produce water as a waste product. All in all, 32 molecules of ATP are created via respiration in each cell.