3 × 9 to the power of X × 81 = 3 to the power of 25

3 × 9 to the power of X × 81 = 3 to the power of 25

3 × 9 to the power of X × 81 = 3 to the power of 25
3*9^x*81^x=3^25
3^(2x+1+4x)=3^25
6x+1=25
x=4

(12th power of 5.81 × 10-10th power of 5 × 10) / (- 4th power of 1.25 × 10) × (6th power of 1.6 × 10)

Original formula = [(581-5) × 10 ^ 10] / (- 1.25 × 6 × 10 ^ 10)
=576/7.5
=76.8

3 / 5 square meters = how many square decimeters

60 square decimeters

Which kind person helps me to do an application problem
In a rush to answer ratio, 5 points are required for one right question, 8 points are required for one wrong question, 0 point is required for those who do not answer the question, and Taotao has 12 points in total. How many times does he rush to answer? How many questions are he right? How many questions are he wrong?
It's a formula``````
Please use the sixth grade method

X * 5-y * 8 = 12, the solution is: x = 4, y = 1, x = 12, y = 6

The power supply voltage used by a student is 12V, and the resistance value of resistance R2 is 40 Ω. After closing the switch, the ammeter shows 0.5A

R2 is 40 ohm, and the total resistance is r = 12 / 0.5 = 24 ohm, indicating that there is a resistor R1 in parallel with R2
R1=R*R2/(R2-R)
Namely:
R1 = 24 * 40 / (40-24) = 60 Ω

F (x) = the x power of a minus 1 to find the range?

F (x) = the x power of a minus 1 to find the range?
Analysis: ∵ f (x) = a ^ X-1 = = > A ^ x ∈ (0, + ∞)
∴a^x-1∈(-1,+∞)
The range of F (x) = x power of a minus 1 is (- 1, + ∞)

How important is it?

what is the weight of

Fourth grade composition exercise 3: new discoveries in life

When we talk about major discoveries, we may think that scientists seem to have a great distance from our lives. However, as long as we work hard, intriguing scientific phenomena can be found everywhere in our lives

How many watts of power is an air conditioner equivalent to?

1p = 0.735kw "horse power" is a unit of power, which means one horsepower = 750W. For household air conditioners, it is indeed a foreign practice to use "horse power" to measure. Here "horse" refers to the input power. Converted into the w that is used to be expressed by the output power in our country. A "horse power" is equivalent to 2200W -- 2600

There is such a question: "a = 2 & # 178; + 2B & # 178; - 3C & # 178;, B = 2, C = A & # 178; + 2B & # 178; - 3C & # 178;", when a = 1, B = 2, C=
It is known that a = 2 & # 178; + 2B & # 178; - 3C & # 178;, B = 2, C = A & # 178; + 2B & # 178; - 3C & # 178; ", when a = 1, B = 2, C = 3, find the value of a-b-c. one student pointed out that the B = 2, C = 3 given in the title is redundant. Is his statement reasonable?

Yes
A-B-C
=(2²+2b²-3c²)-2-(a²+2b²-3c²)
=2²+2b²-3c²-2+a²-2b²+3c²
=2²-2+a²
There were no B and C in the results
So the B = 2 and C = 3 given in the title are redundant