1. Solve the following equation and test. X + 0.3 = 1.83 + x = 5.4x-1.5 = 4x-6 = 7.6

X + 3.2 = 4.6, x = 4.6 - 3.2X = 1.4x - 2 = 15x = 15 + 2x = 17x + 0.3 = 1.8x = 1.8 - 0.3x = 1.53 + x = 5.4x = 5.4 - 3x = 2.4x - 1.5 = 4x = 4 + 1.5x = 5.5x - 6 = 7.6x = 7.6 + 6x = 13.6!

5.6 is 0.8 less than 20% of a number. What is the number? Use the equation to solve

(5.6 + 0.8) (5.6 + 0.8) 20% = 6.4 and 20% = 20% = 32 people from the people's Republic of the people's people and the people's people and the people's people are the people's people and the people's people and the people's people are the people's people and the people's people are the people's people and the people's people and the people's people and the people's people and the people's people and the people's people's people and the people's people and the people's people and the people and the people's people and the people's people and the people and the people's people and the people's people and the people's people and the people's people and the people's people and the people's people and the people's people and the people's people and the people and the people and the people and the people and the people and the people and the people and the people and the people's people's people's people's you can find out what you don't know, you can continue to ask, online at any time, etc. please timely select the satisfactory answer, and you can find out what you don't know what you don't know, you can continue to ask, online online at any time, etc. if you don't know what you don't know, you can continue to ask, please keep online online online, etc. please timely select the satisfactory answer, and you can find out what you don't know what you don't understand, you can continue to ask what you don you don't know, you can continue to ask, online online online online, etc. if you have any questions, you can continue to continue to ask any more questions, you can keep online online online, etc.35#################################################################################

32 is 8 less than 1.6 times of a number. What's the number?

Let's set this digit X
32－1.6X ＝8
1.6X＝8＋32
X＝40÷1.6
X＝25

What is the actual power consumed by connecting the two bulbs marked "220 V, 25 W" and "220 V, 100 W" in series in the 220 V circuit? Which lamp is brighter?

The rated resistance of 220 V and 25 W is 1936 ohm
The rated resistance of 220 V and 100 W is 484 ohm
If there is a circuit voltage divider, we know that the voltages of "220 V, 25 W" and "220 V, 100 W" are 176 V and 44 V respectively, so the actual power consumed by them is 15.82 W and 4 W respectively, so 220 V and 25 W are brighter

If the polynomial (x2 + MX + n) (x2-3x + 4) is expanded without X3 and X2 terms, then the values of M and N are ()
A. 3，4B. 4，3C. 3，5D. 5，3

(x2 + MX + n) (x2-3x + 4) = x4-3x3 + 4x2 + mx3-3mx2 + 4mx + nx2-3nx + 4N = X4 + (M-3) X3 + (4-3m + n) x2 + 4mx-3nx + 4N ∵ does not contain X3 and X2 terms, ∵ M = 3, n = 5, so C

There is an electric energy meter marked with 3000r / kW. H. in his circuit, there is only one electric appliance working. It turns 45 revolutions in 3 minutes. How about the power of the electric appliance?

1. First, the power consumption in these three minutes:
It is 1kwh at 3000 rpm and 1kwh at 45 rpm
45 / 3000 = 0.015 kWh (0.015 degree)
2. Seeking the power of electric appliance
3 minutes = 3 / 60 = 0.05 hours,
Therefore, the power P = 0.015kwh/0.05h
=0.3kW
=300W
The power of this appliance is 300 watts

When a is equal to () in B of fraction a, its value is equal to B; when B is equal to (), its score is a

The square of B a

How much energy does an electric appliance consume in 10 minutes when a single electric energy meter (3000r / kWh) turns 36 turns in 10 minutes? (waiting!)

3000r / kWh means to turn 3000 to 1kW · H
One revolution consumes 1 / 3000kwh of electric energy
The power consumption of 36 revolutions is 36 / 3000kwh = 3 / 250 = 0.012 (KWH)
1KWh=3600000J
Then 0.012kwh = 0.012 * 3600000 = 43200 (J)
At 36 revolutions, the electric energy consumed by the appliance in 10 minutes is 43200j

First decompose the factor and then evaluate (a + B / 2) &# 178; - (a-b / 2) &# 178; where a = - 1 / 2, B = 8

The original formula = (a + B / 2 + A-B / 2) (a + B / 2-A + B / 2) = 2A * b = 2 * (- 1 / 2) * 8 = - 8

1. Solve the following equation and test. X + 0.3 = 1.83 + x = 5.4x-1.5 = 4x-6 = 7.6