-
Anonymous users2024-02-15The teacher will have the answer when he finishes speaking.
-
Anonymous users2024-02-14Solution: Set up to be transported from place A.
X tons of fertilizer to C, 200-x tons of fertilizer from A to D, 240-x tons of fertilizer from B to C, 260-(200-x) tons from B to D (preferably a table) The total freight is Y tons.
y=20x+25(200-x)+15(240-x)+24(x+60)=4x+10040(0≤x≤200)
k = 4 0 and y is smallest when x = 0.
0 tons from A to C and 200 tons from A to D.
B is shipped to C for 240 tons and B for D for 60 tons.
-
Anonymous users2024-02-13Typing out the title, we don't have a book in our hands, and if you don't say any version of the book, it's useless to have a book.
-
Anonymous users2024-02-1211 I won't talk about drawing, you draw it yourself, there are 2 :
y=x-1 y=-x+1
2) From the meaning of the title: curly braces y=-x-3 (x less than or equal to -3) y=x+3 (-3 less than or equal to x less than or equal to 0).
y=-x+3 (x is greater than 0).
Draw these three lines in the drawing, pay attention to the stool Sakura search: the middle is a line segment, and the other two are rays.
12. Set from A to X tons to C, and the freight of the jujube calendar is Y
From the title: y=20x+25(200-x)+15(240-x)+24(x+60).
That is, y=4x+10040 (60 is less than or equal to x, less than or equal to 200), because y increases with x.
So when x=60, y is minimal.
Answer: 60 tons from A to C, 140 tons from A to D; 180 tonnes from B to C, 120 tonnes from B to D
-
Anonymous users2024-02-1111.y=x-1 y=-x+1.
2) From the meaning of the title: curly braces y=-x-3 (x less than or equal to -3) y=x+3 (-3 less than or equal to x less than or equal to 0).
y=-x+3 (x is greater than 0).
Draw this three lines Note: The middle is a line segment, and the other two are Zhilun Stove rays.
12. Set from A to X tons to C, and the freight is Y
From the title: y=20x+25(200-x)+15(240-x)+24(x+60).
That is, y=4x+10040 (60 less than or equal to x, less than or equal to 200), because y increases with x.
So when x=60, y is minimal.
Answer: 60 tons from A to C, 140 tons from A to D; From B to 180 tons of tung block to C, from B to 120 tons to D
-
Anonymous users2024-02-1012. Set from A to X tons to C, and the freight is Y
From the meaning of the title: y = 20x + 25 (200-x) group stuff + 15 (240-x) + 24 (x + 60).
That is, y=4x+10040 (0 fiber resistance x 200 per acre) because y decreases with x.
So when x=0, y is the smallest.
Answer: From A to 0 tons to C, 200 tons to D; From B to 240 tons to C, 60 tons to D.
-
Anonymous users2024-02-09It is known that the function y=y1-y2, where y1 is proportional to x-1 and y2 is proportional to x+1, and when x=0, y=-5; When x=1, y=-6Find the functional relationship between the simplified y and the posture x.
-
Anonymous users2024-02-08y=30x+50x(6-x)+40x(10-x)+80x[12-(10-x)]
20x+860
The shipping fee does not exceed 900 yuan for the group, and there are 4 plans.
When X is equal to 0, that is, all the cars in County A are the verification of Jialuo's Heyun, and the minimum freight is 860 yuan.
2cd;2OC=1, so ohm=ogm=60°, by hm=1, so me=mf( ).
Because oh = oe, h, eh >>>More
I'll help you, but I've been out of school for many years. The formula can't be listed, but I can remind you.
Note: * denotes multiplying by sign;
1.From a2+b 2-6ab=0, we can know that a 2+b 2-2ab-4ab=0, i.e., (a-b) 2=4ab >>>More
Tutoring is not necessary, because according to what you said, your brother's foundation is too poor, and now there are very few good-natured teachers, it is better for you to teach him personally, before teaching, I hope you can calm your mood first, to accept the fact that your brother's foundation is not good, anger can not solve the problem, with a peaceful and encouraging tone, slowly teach him, if you have no confidence in him, there is no one to help him. >>>More
The best way to solve the first problem is to give an example: >>>More