-
Anonymous users2024-02-06Principal = Interest APR over time.
800 (yuan).
A: The principal amount he deposited in the bank is 800 yuan.
-
Anonymous users2024-02-05Hahaha, set it to x, x*, and solve it yourself!!
-
Anonymous users2024-02-041. A rectangular piece of paper with a length of 4 cm and a width of 3 cm is rotated around one side to obtain a cylinder, and the volume of this cylinder is ( ) cubic centimeter or ( ) cubic centimeter.
2. There is a log, the diameter and height of the bottom surface are 3 decimeters, and the volume of this log is ( ) cubic decimeters.
3. The radius of the bottom surface of a cylinder is reduced by 4 times, and the height is expanded by 2 times. It is (8) times smaller in size.
4. The side of a cylinder is a square, and the ratio of the height of this cylinder to the radius is (:1).
5. Xiao Ming goes from A to B, 60 meters per minute when he goes, and 50 meters per minute when he returns, his round-trip time ratio is (5:6), the speed ratio is (6:5), and the return time is more (20)%.
6. The time for a worker to complete a batch of parts is certain, and the time he takes to do each part is proportional to the total number of completed parts (inverse).
7. A part is 8 mm long, and the drawing is 16 cm on the design drawing, and the scale of this drawing is (1:20).
8. The distance from Beijing to Shanghai is 1050 kilometers, and (35) cm should be drawn on a map with a scale of 1:3000000.
9. After enlarging a right-angled triangle in a ratio of 2:1, the length of each side of the triangle is enlarged to (2) times the original, but the (shape) of the figure remains unchanged.
10. Two numbers that are reciprocal to each other, they must be (inversely) proportional.
11. Xiao Wang's height and weight (disproportionate).
12. The ratio of two numbers is 1 3, and the number is expanded by 3 times at the same time, and the ratio is (unchanged).
3. Columnar calculation:
1. A barrel is filled with half a barrel of oil, and after pouring out 2 5, there are still 15 kilograms left, how many kilograms of oil can this barrel hold?
Solution: This barrel can hold oil:
50kg2, a kind of pesticide, prepared with liquid medicine and water according to 1:1500.
1) To prepare kilograms of this pesticide, how many kilograms of liquid medicine and water are needed?
Medicine needed: Water needed:
2) Now that only 540 kg of water is available, how many kg of liquid medicine is needed to prepare this pesticide?
Medicine: 540 1500*1=
3) If there are only 3 kilograms of liquid medicine now, how many kilograms of this pesticide can be prepared?
This pesticide can be prepared: (1 + 1500) * 3 = 4503kg
3. An engineering team paved a railway, the original plan was to pave kilometers per day, but the actual daily paving was 25% more than the original plan, and it took 12 days to actually pave this section of the road, how many days did the original plan take to pave it?
-
Anonymous users2024-02-03The slope of pq is :(4-1) (2+1)=1, so the slope of the straight line is also 1
Let this tangent equation be y=x+b
This line intersects with a curve and can be defined by a system of equations.
y=x+by=x^2
Solution. i.e. x 2-x-b=0
Since it is a tangent, there is only one intersection, i.e. x 2-x-b=0 has two identical solutions.
By the discriminant formula 1+4b=0
Find b= -1 4
So the tangent equation is y= x - 1 4
-
Anonymous users2024-02-02The first Huai Dou trembling was reduced to five-fifths of the sales and changed to four.
Two of the three points of lead defeat.
Three quarters. Two thirds.
Three-fifths. Quarter.
-
Anonymous users2024-02-01Fifth. Four, thirds.
Two, quarters.
Three, thirds.
Two, three-fifths and one-quarters.
-
Anonymous users2024-01-31The numerator and the denominator are reduced...
-
Anonymous users2024-01-30Change: x2+(y-2)2=3, the center of the circle is (0,2), the radius root number 3 is set to the tangent y=kx+b, kx-y+b=0, bring in the p point, and get the formula 2k+b-1=0
The distance from the center of the circle to the tangent is the radius, so d = root number 3 = the distance from the point to the straight line, the formula is obtained to solve the system of equations, and the values of k and b are obtained, and (1) is solved.
After the linear equation is solved, the system of equations is solved with the circle to obtain the values of tangent points a and b, and then the distance formula from point to point is obtained to obtain the length of pa, and (2) is solved.
-
Anonymous users2024-01-29140 is 140 because 2 square decimeters = 200 square centimeters.
You can only understand, not speak.
With the countless experience of my maiden, I will tell you that when you meet someone you like, a man should be thick-skinned, chase and fight, no matter what he says, don't take it to heart. I want to move her with my sincerity. In the process of pursuing, you must also master each degree, too much of a success, too fast pace will also frighten girls. >>>More
1. Regarding how to repay Huabei, first open the browser on the computer, keywords"Alipay", enter the official website of Alipay, and log in to your Alipay. >>>More
Buy Nokia 6300, the second largest sales volume in the world last year, and the cost performance is good, and it is easy to use. >>>More
You're so young, why bother thinking that. For the current man, you should be clear about how you feel now, but at the same time, think about it yourself, don't you be moved by a man who doesn't mind your past cares about you so much? Why can't you try to accept him? >>>More