Sixth grade volume 1 Chinese lesson 4 exercise book question 6 answer

Sixth grade volume 1 Chinese lesson 4 exercise book question 6 answer

A: it highlights the characteristics of Zhangjiajie: 1. Large quantity; 2. Overlapping; 3. Various forms; 4. High mountains

When you hear the following sounds: the sound of water, the sound of birds, what do you think of? Please write it down in a few sentences

Spring, by the stream in the mountains

Zhang Hua read a story book. He planned to finish it in five days. In fact, he read six more pages every day than he planned. As a result, he finished it one day ahead of schedule. The book is worth reading

It's very simple to look at this book as 1. Originally, the number of pages read every day is 1 △ 5 = 1 / 5, but the number of pages read one day in advance is 5 - 1 = 4. In fact, the number of pages read every day is 1 △ 4 = 1 / 4, and the difference every day is 1 / 4 - 1 / 5 = 1 / 20. The efficiency of reading more divided by the difference is 6 △ 1 / 20 = 120 pages

Solving equation 4 (x + 1) ^ 2-1 = 24
There should be two answers

4(x+1)^2-1=24
4(x+1)^2=25
(x+1)^2=25/4
x+1=±5/2
So x = - 7 / 2 or x = 3 / 2
If you don't understand, please ask, I wish you a happy study!

One seventh of two meters is a fraction of one meter. How many meters is it

One seventh of two meters is one meter, two seventh of one meter is two seventh of one meter

Given that the function f (x) = α SiNx + btanx + 1 satisfies f (5) = 7, find the value of F (5 / 99 · π)

f(x)=αsinx+btanx+1
f(5)=asin5+btan5+1=7
asin5+btan5=6
There is a question in your question: is it to find the known f (x) = asinx + btanx + 1, and satisfy f (Wu / 5) = 7. Find f (99 Wu / 5)
F (99 Wu / 5) = f (20 Wu / 5) = asin (20 Wu / 5) + btan (20 Wu / 5) + 1
=-6+1=-5

For a project, Party A works alone for 7.5 hours, and Party B works alone for 5 hours. If the two work together for 1 hour, and Party B works alone for the rest
(1) How many hours will it take to finish?
(2) If 600 yuan is paid for this project, how will it be distributed according to the workload
 

1.
1=1/7.5+1/5+x/5
The solution is x = 10 / 3 hours
two
1 / 7.5 of the quantities completed by Party A = 2 / 15,
Party B completes 13 / 15 of the project quantity
The total remuneration is 600 employees, 600 * 2 / 15 = 80
So a gets 80 yuan and B 520 yuan

How to calculate cos13 ° cos58 ° + sin13 ° sin58

=Cos (13-58) = cos45 = 2 ^ 0.5/2, which is the root sign of two
cos(a-b)=cosacosb+sinasinb
Remember the formula

In the formula F = ma, when the acceleration a is negative, f is also negative. Does the negative sign here mean that the direction of resultant force is the same as that of acceleration

In the formula F = ma, when the acceleration a is negative, f is also negative. The negative sign here means that the direction of resultant force is the same as that of acceleration
This is right

K is an integer____ The solution of equation 5x-2k = - x + 4 is between 1 and 3

5x-2k=-x+4
6x=2k+4
x=(k+2)/3
one