The U.S. aircraft carrier is equipped with an ejection system to help the aircraft take off. It is known that the "F-15" fighter has the maximum acceleration when accelerating on the runway It is 8m / S2, and the takeoff speed of the aircraft is 50M / s. 1. If the aircraft taxis for 100m and then takes off, what initial speed must the ejection system make the aircraft have at least? 2. If the aircraft carrier is not equipped with ejection system, and the aircraft can still take off normally on this ship, what is the length of the deck of the ship at least

The U.S. aircraft carrier is equipped with an ejection system to help the aircraft take off. It is known that the "F-15" fighter has the maximum acceleration when accelerating on the runway It is 8m / S2, and the takeoff speed of the aircraft is 50M / s. 1. If the aircraft taxis for 100m and then takes off, what initial speed must the ejection system make the aircraft have at least? 2. If the aircraft carrier is not equipped with ejection system, and the aircraft can still take off normally on this ship, what is the length of the deck of the ship at least

Substitute V ^ 2-v0 ^ 2 = 2aX into the formula to get 50 ^ 2-v0 ^ 2 = 2 * 8 * 100 to get v0
V0 = 30, so the initial velocity is 30
(2) V ^ 2-v0 ^ 2 = 2aX 50 ^ 2-0 ^ 2 = 2 * 8 * x the value of X is the answer

A fraction plus one sixth of it is equal to two times of five. Find this number (by solving the equation)

Let this number be X
X plus one sixth x is five times two
Seven sixths x is ten
X equals 8 and 4 / 7

Famous bridges at all times and in all over the world and poems describing bridges
The bridge had better be more foreign, and the poem should be written from the source

Tomorrow, on the long bridge, the city will be destroyed to see the chopping of the dragon. (zaqu songs · travel of the strong man) Liu Yuxi
There are willows in the East and west of the bridge. People come and sing. (zaqu geci · Zhuzhi) Liu Yuxi
A little woman by a bridge in Yangzhou, a businessman in Changgan city. After three years of no news, she prayed to ghosts and gods
The willows in the Golden Valley Garden are dancing in the spring. It's a beautiful scenery. You can go to Luoyang Bridge alone
On the Wei bridge, the soldiers are seen in xiliutun. (Fu of the Western Han Dynasty) Wei Zheng
Han Yiluo nine city, Yulu floating bridge wanliping. (que Ti) Yang Shidao

Univariate linear equation (27 19:19:29)
When m is a sum, the value of M + 1 divided by 3 is 1? Less than that of 3M + 1?

(m+1)/3=(3m+1)-1
m+1=9m
m=1/8

Three hours later, the two cars were still 120 kilometers apart, and they traveled for another three hours,
Two cars B leave from a and B at the same time. Three hours later, the two cars are 120 kilometers apart. After another three hours, the two cars are 120 kilometers apart. Find the distance between a and B

From the first distance of 120 kilometers to the second distance of 120 kilometers, a total of 240 kilometers were traveled
The speed sum is 240 / 3 = 80 km
The two cars traveled for 6 hours, 80 * 6 = 480km, and then took away 120 km, so the distance between the two places was 40 km
480-120 = 360 km
Supplement: the first time 120 is opposite, the second is opposite

Given m = 2A square + 3ab-2a-1, n = - a square + AB-1, find 3 (m-2n)

M = 2a² + 3ab - 2a - 1N = -a² + ab - 13(M - 2N)= 3(2a² + 3ab - 2a - 1 + 2a² - 2ab + 2)= 3(4a² + ab - 2a + 1)= 12a² + 3ab - 6a + 3

Simple operation of 1.9 + 1.99 + 1.999 + 1.9999 + 1.99999

2x6-(0.1+0.01+0.001+0.0001+0.00001+0.000001)
=12-0.111111
=11.888889

There are 8 cases of apples in the store, each of which has the same weight. If you take 2 kg out of each case, the rest is exactly equal to the weight of the original 6 cases. How much is the original weight of each case
Kilogram?
A series of equations,

8x-2*8=6x
2x=16
x=8
The original weight of each box is 8 kg

If a × B = 3A + 4b, 7 × x = 45 is known, then find X
But 7 × 6 = 45?

7#x=3*7+4x=45
4x=24
x=6

In the complex plane, the vertices a and B of Δ OAB correspond to the complex numbers Z1, Z2 and O respectively. If | z1-2 | = 1, Z2 = (1 + I) Z1, the maximum area of Δ OAB is obtained
Minimum and maximum

Since Z2 = √ 2 (sin45 ° + I · cos45 °) · Z1, from the geometric meaning of multiplication, the vector ob is obtained by the vector OA rotating 45 ° counterclockwise and the length becomes √ 2 ·| OA |. Therefore, ⊿ OAB is an isosceles right triangle with OA as the right side