Question

Помогите плиз!! дам 40 баллов!! № 1 птица кедровка , делая запасы, спрятала 30 орешков в разных местах, а нашла 20% запаса. сколько орешков НЕ нашла кедровка? №2. в двух канистрах 70 литров бензина. сколько литров бензина в 1 канистре,если во 2 всего 45% всего бензина? №3. решите уравнение: а)1,6х - 0,8= 1,2х + 20 б) 2,4х - 1,3=3,2 х - 37,3 №4.

Answer 1

30х20:100=6
70х45:100=31.5
1.6х-1.2х=20-0.8
0.4х=19.2
х=19.2:0.4
х=48

2.4х-3.2х=-37.3+1.3
-0,8х=36
х=36:(-0.8)
х=45

Answer 2

I can help you with your questions. Let's go through each of them one by one:

Question 1: A bird named Kedrovka hid 30 nuts in different places as a stockpile, but then found only 20% of the stockpile. You want to know how many nuts Kedrovka didn't find.

To solve this, we can calculate 20% of the total number of nuts and subtract it from the initial stockpile of 30 nuts:

20% of 30 = 0.2 * 30 = 6

So, Kedrovka didn't find 6 nuts.

Question 2: There are two canisters with a total of 70 liters of gasoline. You want to find out how many liters of gasoline are in one canister if the second canister contains 45% of the total gasoline.

To solve this, we can calculate 45% of the total gasoline and then divide it by 2 (since there are two canisters):

45% of 70 = 0.45 * 70 = 31.5

31.5 liters of gasoline are in the second canister. Since there are two canisters, each canister contains half of this amount:

31.5 / 2 = 15.75

Therefore, each canister contains approximately 15.75 liters of gasoline.

Question 3: You have provided two equations, and I will solve them for you.

a) 1.6x - 0.8 = 1.2x + 20 To solve this equation, we can start by simplifying it:

1.6x - 1.2x = 20 + 0.8 0.4x = 20.8

Now, let's isolate x by dividing both sides of the equation by 0.4:

x = 20.8 / 0.4 x = 52

So the value of x in this equation is 52.

b) 2.4x - 1.3 = 3.2x - 37.3 To solve this equation, we can start by simplifying it:

2.4x - 3.2x = -37.3 + 1.3 -0.8x = -36

Now, let's isolate x by dividing both sides of the equation by -0.8:

x = -36 / -0.8 x = 45

So the value of x in this equation is 45.

Question 4: I'm sorry, but you didn't provide a question for number 4. Could you please provide more details or rephrase the question?

Let me know if you need any further clarification or if there's anything else I can