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The mother monkey divides the peach for the little monkey. If no little monkey divides four peaches, there will be 15 peaches left. If each little monkey divides five peaches, there will be 10 peaches left. How many monkeys are there
Landlord, I think you should be the fourth grade of primary school, I am the second grade of middle school
Question: the mother monkey gives the little monkey peaches. If each little monkey gets 4 peaches, there will be 15 peaches left. If each little monkey gets 5 peaches, there will be 10 peaches left. How many little monkeys are there?
Answer: (15 + 10) / (5-4) = 25
A: there are 25 little monkeys
If you can, just Thank you!
The monkey king divided the peaches for the little monkeys. If each monkey divided 10 peaches, two little monkeys didn't get the peaches
The monkey gives the peach to the monkey. If each monkey gets 10 peaches, there will be two small peaches left. If each monkey gets 8 peaches, it's just finished
There are x monkeys and Y peaches
10(x-2)=y
8x=y
Solution
x=10
y=80
A: there are 10 monkeys and 80 peaches
For the same 2-liter bottle of beverage, Aunt Li bought it for 5.05 yuan, while Aunt Zhang bought it for 6.40 yuan,
But if you buy three bottles, you get one free. Please calculate. Aunt Zhang and Aunt Li both buy four bottles each. Who is the best buyer? (please answer in two ways)
Li: 5.05 × 4 = 20.2 yuan
Zhang: 6.40 × 3 = 19.2 yuan
Aunt Zhang is a good buy
During the golden week of national day, all supermarkets have launched preferential sales promotion. For the same kind of 2-liter bottle of drinks, Aunt Li pays 5.25 yuan for one bottle, while Aunt Zhang pays 6.12 yuan for one bottle, but if you buy three bottles and get one free, please calculate. If Aunt Zhang and aunt Li buy eight bottles each, who is the best buyer
Aunt Zhang's good fortune
Aunt Zhang's money = 6.12 * 6 = 36.72 (buy three get one free, buy six get two free)
Aunt Li's money = 5.25 * 8 = 42
For the students' autumn outing, they pay 65 yuan for three snacks and five cans of drinks, 87 yuan for five snacks and three cans of drinks, how much for one snack and one can of drinks?
Set X Yuan for snacks and Y yuan for drinks
It is known that {3x + 5Y = 65} 1, {5x + 3Y = 87} 2
From 1 we can get {y = 13-0.6x} 3
Substitute 3 for 2 to get 5x + 3 (13-0.6x) = 87
5X+39-1.8x=87
5x-1.8x=87-39
3.2x=48
x=15
Substitute x = 15 for 1 to get 1
y=4
What do you write
There are three supermarkets near the school. Supermarket a buys five for three and supermarket B gets 30 yuan
Which supermarket do you think teachers should go to
Five for one, not five for three
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The teacher should go to supermarket B
A supermarket 2 yuan per bottle, five free one, a single bottle price of 1.66666 yuan per bottle
B supermarket 2 yuan per bottle, over 30 yuan discount, single bottle price is 1.6 yuan per bottle
C supermarket 2 yuan per bottle, 10% discount, single bottle price to 1.8 yuan per bottle
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Mr. Li wants to buy 30 bottles of drinks at 2 yuan, which store is more cost-effective? Liming Supermarket: buy 3 bottles and get one free. Lihua Supermarket: 20% off
2 * 3 = 6, 6 yuan for 4 bottles, 1.5 yuan for each bottle, 1.5 * 30 = 45 yuan
2 * 0.8 = 1.6 yuan, 1.6 yuan per bottle, 1.6 * 30 = 48 yuan
So Liming supermarket is cost-effective
Xiao Song bought several bags of fresh milk of a certain brand with a unit price of 2.8 yuan in the supermarket. After a while, he went to the supermarket and found that this kind of fresh milk was selling at a profit of 0.3 yuan per bag. So he bought two more bags than last time, but only spent 2 yuan more than last time. How many bags of fresh milk did he spend last time?
Suppose you bought x bags last time, then
2.8x=(2.8-0.3)(x+2)-2
The solution is x = 10
A: last time I spent 28 yuan to buy 10 bags of such fresh milk
Supermarket a and supermarket B carry out profit giving sales activities (the price of the two supermarkets is the same). Supermarket a: the price is within 200 yuan
Supermarket a and supermarket B carry out profit giving sales activities (the price of the two supermarkets is the same). Supermarket a: 10% discount for the price within 200 yuan, and 20% discount for the price beyond 200 yuan. Supermarket B: 8.5% discount for all
Question (1): which is the right place to buy a commodity with a price of 300 yuan?
Which is the right place to buy 450 yuan goods?
3： Is it suitable for supermarkets A and B to buy goods with () yuan?
Especially the third question! I've written the first two questions. I want to see if I'm right. The first question is 280 yuan for a and 255 yuan for B. the second one is supermarket B. I don't know. I'll give it to you~
It's due tomorrow! Today is October 10, 2010!
The first question is B, a, 200 * 0.9 + 100 * 0.8 = 260, B 300 * 0.85 = 255, so go to B
The second question B a 200 * 0.9 + 250 * 0.8 = 380, B 450 * 0.85 = 382.5, so it's B
The third question 400, let's buy X Yuan items, 200 * 0.9 + (X-200) * 0.8 = 0.85x, just solve the equation, the premise is x > 200, because within 200, it must be B cost-effective
Xiao Wang bought several boxes of milk of a certain brand with 24 yuan in the supermarket. After a while, he went to the supermarket and found that this kind of milk sold at a profit of 0.4 yuan per box. He also bought two more boxes with 24 yuan than last time. How many boxes of this kind of milk did he buy for the first time?
Let him buy x boxes of this kind of milk for the first time. According to the meaning of the question, he gets (24x − 0.4) (x + 2) = 24, and the solution is X1 = - 12, X2 = 10. Through the test, X1 = - 12, X2 = 10 are the roots of the original equation, but x = - 12 is not the meaning of the question, so he will give it up
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