Junior high school mathematics problems (on the application of quadratic equation of one variable) The profit of a store in January is 2500 yuan, and the profit in March is 3025 yuan. What is the average monthly growth rate of the profit in these two months Would you please write down your ideas?

Junior high school mathematics problems (on the application of quadratic equation of one variable) The profit of a store in January is 2500 yuan, and the profit in March is 3025 yuan. What is the average monthly growth rate of the profit in these two months Would you please write down your ideas?

Let the growth rate be X
Square of 2500 (1 + x) = 3025
X1 = - 1 + radical 11
X2 = - 1 - radical 11

At the intersection of east-west street and South-North street, a goes from west to east along East-West Road, and the speed is 4 m / s. B goes from south to north along north-south road, and the speed is 3 M / s. when B goes on 50 meters after passing o point, a just passes o point. Can you find out the position of each person when the two people are 85 meters apart?

Let a pass through the time origin of point O. suppose that after x seconds, the distance between a and B is 85 meters. Because the two roads are perpendicular to each other, a and B can walk on the two right angles of a right triangle. Pythagorean theorem after x seconds, there are (50 + 3x) & sup2; + (4x) & sup2; = 85 & sup2; we can get x = 9 or x =

How to decompose prime factor by short division?
To have examples, (at least 2) good bonus points

I'll tell you, use prime number to remove... Know what is prime number? You can use the smallest, you can also use the larger, as long as it is prime number
For example, 2-10
|_________
five
10=2*5
7|63
|_________
3 |9
|_______
three
63=7*3*3
This expression is not clear... I can't send pictures when I faint

An area of 560 square meters of green space, increase the width from 8 meters to 24 meters, the length of the same. After the expansion of the green area is how much?

The length of the rectangle is 560 △ 8 = 70 (m), and the expanded area is 70 × 24 = 1680 (M2). A: the expanded green area is 1680 m2

Prose is generally divided into why and what

Lyric Prose and narrative prose

A problem of finding rules in the first day of junior high school
What is the value of 1-2 + 3-4 + 5-6 +,,, + 2003-2004
It's better to explain the process

1-2=-1
3-4=-1
.
2003-2004=-1
The original formula = - 1 * (2004 △ 2) = - 1 * 1002 = - 1002

Chinese English translation should be accurate
Chinese English translation must be accurate
The world is so unfair, I can only do my best to make you happy in the future
Don't worry about the source, translation is

The world is so unfair, I can only do my best to make you happy in the future
The world is so unfair,what I can only do is to try my effort to make you happy in the future.

Unit 9 page 66 2D translation
thank you

Hey, Nick, can you come to my house on Saturday? My cousin from Xi'an is coming here
Oh, Sam, I remember when he saw you, we went cycling together
Yes, that's right
I'd love to come, but I'm afraid I can't. I have an exam on Monday, so I have to prepare for it
That's too bad, but Sam won't be back until next Wednesday. Can you hang out with us on Monday night
Sure, see you on Monday!

What are the common factors of 18 and 24______ The greatest common factor is______ ．

The factors of 24 are: 1, 2, 3, 4, 6, 8, 12, 24. The factors of 18 are: 1, 2, 3, 6, 9, 18. Therefore, the common factors of 24 and 18 are: 1, 2, 3, 6. The greatest common factor is 6. So the answer is: 1, 2, 3, 6, 6

The linear function y = KX + B, X is proportional to y, when x is equal to 5, y is equal to 6
Is there a problem or am I wrong

Since it is proportional, naturally B is zero