Happy every day fifth grade winter vacation homework math and page 15, the second big problem all how to do?

Happy every day fifth grade winter vacation homework math and page 15, the second big problem all how to do?

. so much!
You can't beat a few points. You can see for yourself
(1) The area where cucumbers are planted accounts for 1.5 out of 6 of the land
(2) Garlic covers 0.5 percent of the land
(3) . no more questions
A: the area for growing these two vegetables is 2 / 6 of the land
(4) Don't answer me. I'm lazy!
A: 4 out of 6
(5) Can't type division sign, can only use Chinese!
3600 divided by 6 = 600 (square meters)
600 divided by 2 = 300 (square meters)
For reference only! Not necessarily right!

The sum of all the simplest true fractions whose denominator is 10 is ()
3 / 16 + 1 / 4=
1 / 6 + 3 / 4=
2 / 3 + 2 / 5=
1 / 6 + 3 / 7=
Sister Li has a piece of square cloth, which can be made into a scarf with a side length of 8 cm or a square scarf with a side length of 10 cm. There is no surplus. How many cm is the side length of this square cloth at least?
Uncle Wang has contracted 4 / 5 hectares of orchards, of which pear orchards account for 1 / 6 of the total area, peach orchards account for 1 / 3 of the total area, and the rest are apple orchards. How much of the total area is apple orchard?

3 / 16 + 1 / 4 = 3 / 16 + 4 / 16 = 7 / 16 + 1 / 6 + 3 / 4 = 2 / 12 + 9 / 12 = 11 / 12 2 / 3 + 2 / 5 = 10 / 15 + 6 / 15 = 16 / 15 = 1 and 1 / 15 1 / 6 + 3 / 7 = 7 / 42 + 18 / 42 = 25 / 423

Given that the equation x2-6x + q = 0 can be formulated as (X-P) 2 = 7, then x2-6x + q = 2 can be formulated as ()
A. （x-p）2=5B. （x-p）2=9C. （x-p+2）2=9D. （x-p+2）2=5

∵ x2-6x + q = 0 ∵ x2-6x = - Q ∵ x2-6x + 9 = - Q + 9 ∵ (x-3) 2 = 9-q according to the meaning of the title, P = 3, 9-q = 7 ∵ P = 3, q = 2 ∵ x2-6x + q = 2 is x2-6x + 2 = 2 ∵ x2-6x = 0 ∵ x2-6x + 9 = 9 ∵ x2-6x (x-3) 2 = 9, i.e. (X-P) 2 = 9, so choose B

If f (x) = lnx-1, then the zero point of F (x) is

The zero point is the focus on the x-axis
f（x）=0
x=e
The point is (E, 0)
If it's a big proposal, it's better to find the definition field first, that is, x > 0

It is known that the two real roots of the equation AX ^ 2 + BX + C = 0 about X are 1 and - 1, then a + B + C =? A-B + C =?

A + B + C = 0, A-B + C = 0, just replace the two real roots

A 220 V 100 W electric lamp is connected to a 3000r / kWh electric energy meter. It turns 121 turns in 20 minutes. This is the voltage

Or 220 V, no matter how many turns, the voltage is 220 V, this will not change. I guess you want to ask how much electricity consumption is when turning 121 turns?
The power consumption is: 121 / 3000 = 0.0403kwh, that is, the power consumption in 20 minutes is about 0.04 degree

I'm too lazy to work out some math problems
（-1.2）x（-3）
(- 1 and 1 / 3) x (4 and 1 / 2)
15x（-2/5）
（-17/8）x0

（-1.2）x（-3）=3.6
(- 1 and 1 / 3) x (4 and 1 / 2) = - 6
15x（-2/5）=-6
（-17/8）x0=0

Power: 550W, rated frequency: 50Hz, rated voltage: 220V, how many kilowatts per hour~

Power consumption per hour is the product of power and time, that is, power consumption per hour = 550 / 1000x1 = 0.55kwh
55 kwh an hour

Given that (X-2) (x + 3) of 3x + 4 = (X-2 of a) + (x + 3 of B), find the value of ab
It's better to explain the process of the problem to me
On the first floor, didn't I tell you about the score? You haven't learned the score. Others can understand it, but you can't see it. You can only say that your IQ is average! There are too few people who like this way of answering. I hope the people who want to answer will use their brains to have a closer look. Don't think you are anonymous.

(3x+4)/（x-2）（x+3）=A/(x-2)+B/(x+3)
(3x+4)/（x-2）（x+3）=(Ax+3A+Bx-2B)/（x-2）（x+3)
Then: ax + 3A + bx-2b = 3x + 4
(A+B)x+(3A-2B)=3x+4
So: a + B = 3, 3a-2b = 4
The solution is: a = 2, B = 1
So: ab = 2

When a motor works, the voltage is 220 V, the current is 10 A, and the coil resistance is 2 Ω. How much electric energy is converted into internal energy

P=UI=20V*10A=2200w
P heat = I & sup2; r = (10a) & sup2; * 2 Ω = 200W
200w/2200w=9.1%
9.1% of electric energy is converted into internal energy