When a tourist group travels, the average fare per person is 40 yuan. Later, 8 people are added, so that the fare per person is 35 yuan, and the rental fee is 35 yuan______ Yuan

When a tourist group travels, the average fare per person is 40 yuan. Later, 8 people are added, so that the fare per person is 35 yuan, and the rental fee is 35 yuan______ Yuan

The original number of people is: 35 × 8 ^ (40-35), = 280 ^ 5, = 56 (people); the rental fee is: 56 × 40 = 2240 (yuan); answer: the rental fee is 2240 yuan. So the answer is: 2240
It is known that in the equal ratio sequence {an} composed of positive numbers, the common ratio q = 2, A1 · A2 · A3 · If A30 = 245, then A1 · A4 · A7 · •a28=（　　）
A. 25B. 210C. 215D. 220
It is known that in the equal ratio sequence {an} composed of positive numbers, the common ratio q = 2, A1 · A2 · A3 ·· A30 = 245, then A2 · A5 · A8 ·· a29 = A1 · A4 · A7 ·· A28 · 210a3 · A6 · A9 ·· A30 = A1 · A4 · A7 ·· A28 · 220, so A1 · A4 · A7 ·· A28 = 25, so a is selected
a1*a2*a3*… *a30=a1*（a1*q）*（a1*q^2）… *(a1*q^29)=a1^30*q^（1+2+… 29）=a1^30*q^435=2^45
So A1 ^ 30 = 2 ^ 45 / 2 ^ 435, so A1 ^ 10 = 1 / 2 ^ 130
a1*a4*a7*… *a28=a1*（a1*q^3）*（a1*q^6）*（a1*q^6）… *(A1 * q ^ 27) = A1 ^ 10 * q ^ (1 + 4 + 7 + 10 + 13...)
a1*a2*a3*… *a30=a1*（a1*q）*（a1*q^2）… *(a1*q^29)=a1^30*q^（1+2+… 29）=a1^30*q^435=2^45
So A1 ^ 30 = 2 ^ 45 / 2 ^ 435, so A1 ^ 10 = 1 / 2 ^ 130
a1*a4*a7*… *a28=a1*（a1*q^3）*（a1*q^6）*（a1*q^6）… *(A1 * q ^ 27) = A1 ^ 10 * q ^ (1 + 4 + 7 + 10 + 13 + 16 + 19 + 22 + 25 + 28) = A1 ^ 10 * 2 ^ 145 = 2 ^ 15
To transport a pile of soil, it takes 15 days to transport 36 vehicles a day. Now it needs to be transported 5 days in advance. How many vehicles should be transported every day? Use the equation to solve it!
Correct 15 points, I don't have much!
Suppose x car can finish every day
（15-5）X=36*15
X=540/10
=54
The base camp organized some students of grade four to go to the Suburban Park. They rented two cars, each with 26 passengers. The total rental fee was 1040 yuan. The tickets were for each person
10 yuan, 15 yuan per person for sightseeing bus
1. How much is the rental fee shared by each person?
How much did they spend on the tour?
20 yuan for the first question and 2340 yuan for the second
If a1 + A4 + A7 + A97 = 100, then A3 + A6 + A9 + A99=
a3=a1*(1/2)^2
.
a99=a97*（1/2）^2
a3+a6+a9+```+a99=(a1+a4+a7+```+a97)*(1/2)^2=25
How much cement does a car transport 148.5 tons of cement per day in X days? If this car transports y tons of cement per day in X days, how much cement does it transport per day
How many tons
5 tons per day
If the car transports y tons of cement in X days, the average daily transportation is Y / X tons
When a tourist group travels, the average fare per person is 40 yuan. Later, 8 people are added, so that the fare per person is 35 yuan, and the rental fee is 35 yuan______ Yuan
The original number of people is: 35 × 8 ^ (40-35), = 280 ^ 5, = 56 (people); the rental fee is: 56 × 40 = 2240 (yuan); answer: the rental fee is 2240 yuan. So the answer is: 2240
The sequence {an} is an equal ratio sequence with a common ratio of 1 / 2. Given a1 + A4 + A7 +. + A97 = 100, find the value of A3 + A6 + A9 +. + A99
a(n)=b/2^(n-1)
a(3n-2)=b/2^(3n-3)=b/8^(n-1)
a(3n)=b/2^(3n-1)=(1/4)*b/2^(3n-3)=(1/4)a(3n-2)
100=a(3*1-2)+a(3*2-2)+...+a(3*33-2)
a(3*1)+a(3*2)+...+a(3*33)=(1/4)[a(3*1-2)+a(3*2-2)+...+a(3*33-2)]=(1/4)*100=25
The sequence {an} is an equal ratio sequence with a common ratio of 1 / 2. It is known that a1 + A4 + A7 +... + A97 = a1 + a1q3 + a1q6 + a1q9 +... A1q96 = 100
a3+a6+a9+......+a99=a1q2+a1q5+a1q8+a1q11+...a1q98=q2(a1+a1q3+a1q6+a1q9+...a1q96)=100*1/2*1/2=25
100/4=25
The first equation is the summation of the sequence with the common ratio q = 1 / 8, which is formulated as
a1(1-q^33)/(1-q)=100
The second equation is also the summation of the sequence with the common ratio q = 1 / 8, which is formulated as
a3(1-q^33)/(1-q)=a3/a1*a1(1-q^33)/(1-q)=a3/a1*100=1/4*100=25
X ^ 2 + 3x-6 = 0
x^2+3x-6=0
x²+3x=6
x²+3x+(3/2)²=6+9/4
(x+3/2)²=33/4
x+3/2=±（√33）/2
X = (- 3 + √ 33) / 2 or x = (- 3 - √ 33) / 2
When a tourist group travels, the average fare per person is 40 yuan. Later, 8 people are added, so that the fare per person is 35 yuan, and the rental fee is 35 yuan______ Yuan
The original number of people is: 35 × 8 ^ (40-35), = 280 ^ 5, = 56 (people); the rental fee is: 56 × 40 = 2240 (yuan); answer: the rental fee is 2240 yuan. So the answer is: 2240