How to keep healthy English composition

People are beginning to attach much more importance to their health these days than ever before. They begin to realize that good healthis the most valuable possession a person can have. However, many people don't know how to stay healthy although great efforts have been made in this regard. In my opinion, there are three things we can do if we want to be in good.
　　First, we should have the right food, because proper nutrition is the most important for good health. Avoid foods with lots of sugar and fat. Eat plenty of high protein foods, vegetables and fruits. Do not overeat. Secondly, we should get proper amount of sleep, because without enough sleep, we will often feel tired and irritable. Allow ourselves at least eight hours of sleep each day. Have a nap at noon if time permits. Finally, we should exercise regularly, because'life depends on exercise'. Regular exercise strengthens our hearts andlungs. In addition, it prevents us from putting on weight.
　　If everyone is to do so, there will be much less complaining about poor health and there will be much more happiness in our life.

How to keep healthy

　　People are beginning to attach much more importance to their health these days than ever before.They begin to realize that good healthis the most valuable possession a person can have.However ,many people don't know how to stay healthy although great efforts have been made in this regard.In my opinion,there are three things we can do if we want to be in good.
　　First,we should have the right food,because proper nutrition is the most important for good health.Avoid foods with lots of sugar and fat.Eat plenty of high protein foods,vegetables and fruits.Do not overeat.Secondly ,we should get proper amount of sleep,because without enough sleep, we will often feel tired and irritable.Allow ourselves at least eight hours of sleep each day.Have a nap at noon if time permits.Finally ,we should exercise regularly,because'life depends on exercise'.Regular exercise strengthens our hearts andlungs.In addition,it prevents us from putting on weight.
　　If everyone is to do so,there will be much less complaining about poor health and there will be much more happiness in our life.

The image of known function f (x) = Ba ^ x passes through points a (1,6), B (3,24)
(1) Find f (x)

The image of function f (x) = Ba ^ x passes through points a (1,6), B (3,24), and these two points are substituted into the function
Then AB = 6, Ba ^ 3 = 24,
If the two equations are divided, then a ^ 2 = 4,
Then a = 2 or - 2, because a must be greater than 0 in F (x) = Ba ^ x,
So a = 2, then B = 3
Find f (x) = 3 × 2 ^ x

If x minus y equals 5, then 14 minus 2x plus 2 y equals 5

14 minus 2x plus 2 y
=14-2（x-y）
=14-2*5
=4
Do not understand can ask, help please adopt, thank you!

Let the probability density of two-dimensional random variables (x, y) be
（x,y）=「Ce∧｛-（2x+y）｝ ,x>0 y>0 |
|"0, others"
Find the constant C?
Let's write about the process, thank you
And this question
http://zhidao.baidu.com/question/521518934?quesup2&oldq=1

Because the probability density f (x, y) must satisfy the normalization condition ∫∫ f (x, y) DXDY = 1, so in this problem ∫∫ CE ^ (- 2x-y) DXDY = 1, the integral region is the first quadrant. Therefore, the integral limits of C ∫ dy ∫ e ^ (- 2x-y) DX = 1, x, y are all 0 to positive infinity, and ∫ dy ∫ e ^ (- 2x-y) DX = 1 / 2 after calculation, so C = 2

How to display the coordinate axis (x axis and Y axis) when drawing in MATLAB?
The drawing command is as follows:
x=0:0.1:10;
y=sin(x);
plot(x,y)
But I want to display the coordinate axis (x axis and Y axis) at the same time,
How to use the command?
My coordinate axes (x and y) mean: the X axis refers to the line y = 0, and the Y axis refers to the line x = 0,
Or how to make the intersection point of the coordinate axis at the origin (0,0)

x=0:0.1:10;y=sin(x);plot(x,y)xlabel('X');ylabel('Y');axis([0,10,-1.2,1.2]);set(gca,'XTickMode','manual','XTick',[0 1 2 3 4 5 6 7 8 9 10]);set(gca,'YTickMode','manual','YTick',[-1 0 1]);grid

Write a division and a multiplication according to 6.4 divided by 0.8 = 6
It's due tomorrow

6.4 divided by 0.8 = 8
6.4 divided by 8 = 0.8
0.8*8=6.4

It is a rectangle with a circumference of 20 cm. The ratio of length to width is 2:3. How many cm are the length and width

A rectangle has two equal lengths and widths
The sum of length and width is: 20 △ 2 = 10 (CM)
Let each copy be x cm
Then the equation can be listed
2x+3x=10
5x=10
∴ x=2
Then 2x = 4 (CM) (length)
3x = 6 (CM) (width)
A: the rectangle is 4cm long and 6cm wide

How to change the general form of quadratic function into vertex form

y=ax^2+bx+c
=a[x^2+bx/a]+c
=a[x^2+bx/a+(b/2a)^2-(b/2a)^2]+c
=a[(x+b/(2a))^2-b^2/(4a^2)]+c
=a[x+b/(2a)]^2-b^2/(4a)+c

It is known that the difference between the polynomial - 2x & # 178; + 3 and a is 2x & # 178; + 2x-7,
(1) Finding polynomial a
(2) When a = - 1, find the value of A

(1) According to the meaning of the title:
　　(-2x²+3)-2A=2x²+2x-7
　∴2A=-4x²-2x+10
　　A=-2x²-x+5
(2) When x = - 1
　A=-2x²-x+5
　　=-2×(-1)²-(-1)+5
　　=4

How to keep healthy English composition