Aunt Wang bought a total of 42.2 yuan of fruit. She bought 8 kg of apples. The unit price of apples is 3.25 yuan, and that of bananas is 4.50 yuan. How many kg of bananas do you buy?

You can do without equations
8×3.25=26
42.2-26=16.2
16.2÷4.5=3.6

Aunt Zhang went to the supermarket and bought 4 kg bananas and 3.5 kg apples, which cost 24.2 yuan. It is known that the price per kg banana is 3.6 yuan
How much is the apple per kilogram? The solution of the equation

Let's set the price of apple as X Yuan: 4x3.6 + 3.5x = 24.2!

The average of several natural numbers (which can be repeated) is 56. Remove 68 of them, and the average of the remaining numbers will be reduced to 55. What is the maximum of these natural numbers?

56*13-68-12*1=

What is the central theme sentence of the snake catcher?

"The snake catcher said" reveals the main theme of the sentence: "familiar with Fu Lian's poison, what is the snake?"

Fifth grade mathematics volume 2 ten minutes to control the classroom test paper answers
The students in the first group are doing two thinking questions. There are 13 people doing the first right question, 10 people doing the second right question, 8 people doing both right questions and 1 person doing both wrong questions. How many people are in the first group
I do this: 13 + 10 + 1-8
=24-8
=16 (person) am I right? If you don't teach me, I'll read it carefully!

Congratulations, you're right. You should be right

X-2 / x + 2-16 / x ^ 2-4 = 1 to solve the equation

Multiply by (x + 2) (X-2)
(x-2)²-16=(x+2)(x-2)
x²-4x+4-16=x²-4
4x=-8
x=-2
When x = - 2, the denominator x + 2 = 0
It's zenggen, it's renqu
The equation has no solution

How to calculate 45 times 98 with a simple algorithm

45x98
=45x(100-2)
=45x100-90
=4500-90
=4410

Who can help me solve some simple math problems in junior three!
(1) The waist length of isosceles trapezoid is 6 cm, the cosine value of a base angle is 2 / 3 (root 2), and the upper base is root 2 cm?
(2) In the center of circle 0, the extension line of string AB = CD, AB, AC intersects at point P, and PA = PC
(3) The diameter of the center O is 15 cm with two radii OA.OB Perpendicular to each other, angle OAC = 60 degrees, AC intersection radius ob extension line at C, intersection circle at D, CD
(4) In a circle with a radius of 4 cm, there is a chord AB = 10 cm. Find the degree of the inferior arc AB is facing, and the distance between AB and the center of the circle?
(5) In the inscribed quadrilateral ABCD, AC bisects BD vertically, BAC = 50 degrees, and BCD?
(6) The ratio of the three adjacent internal angles in a circular inscribed quadrilateral is 5; 6; 4?
(7) Let Q be an acute angle, and the difference between the two X ^ 2 + 3x + 2sinq = 0 is the root sign 5
(8) If a is an acute angle and 2cos ^ 2A + 7sina-5 = 0, find the degree of a?
(9) In the right triangle ABC, angle c = 90 degrees, B = 8, the bisector ad of angle a = (16 * radical 3) / 3, find the value of angle B and a, C?
(10) In the triangle ABC, angle ABC = 45 degrees, angle ACB = 30 degrees, ab = 2 * root 2, find the area of triangle ABC?
If the answer is good, I will add points!

(1) Let the base angle be a, cosa = 2 / 3 (radical 2), the length of the line segment between the bottom and point a is 6 * 2 / 3 (radical 2) = 4 times radical 2, and the height is 2, so the area of the trapezoid is 1 / 2 * (radical 2 + 4 times radical 2 + 4 times radical 2) * 2 = 10 times radical 2 square centimeter
(2) The intersection of AB and AC at point a cannot be extended at point P
(3) Triangle oad is equilateral triangle, ad = OA = 15 / 2, in triangle AOC, AC = 2oa = 15, so CD = ac-ad = 7.5cm
(4) The diameter is the biggest string in the circle, the radius is 4cm, the string can't be 10cm
(5) In the circle inscribed quadrilateral ABCD, AC vertically bisects BD, the angle BAC = angle DAC = 50, and the circle inscribed quadrilateral is diagonally complementary, so the angle BCD = 180 - (50 + 50) = 80 degrees
(6) According to the diagonal complementation of the inscribed quadrilateral in the circle, we can get: 360 / (5 + 6 + 4 + 3) = 20, so the maximum number of angles is 20 * 6 = 120 degrees, and the minimum number of angles is 20 * 3 = 60 degrees
(7) X1 + x2 = - 3, X1 * x2 = 2sinq, x1-x2 = radical 5, (x1-x2) ^ 2 = (x1 + x2) ^ 2-4x1 * x2 = 9-8sinq = 5, SINQ = 1 / 2, q = 30 degrees
(8) Sin ^ 2A + cos ^ 2A = 1, cos ^ 2A = 1-sin ^ 2a, substituting 2cos ^ 2A + 7sina-5 = 0, we get 2Sin ^ 2a-7sina + 3 = 0, Sina = 1 / 2 or Sina = 3 (rounding off), so a = 30 degrees
(9) Coscad = AC / ad = root 3 / 2, so angle CAD = 30 degrees, angle cab = 60 degrees, B = 30 degrees, C = 16, a = 8 times root 3
(10) Ad = AB * sin45 = 2, DC = ad * tan30 = 2 * root 3 / 3, area of triangle ABC = 2 + two thirds root 3

The original price of a certain brand TV set is 4500 yuan. The price is reduced by 1 / 15 and 1 / 21. What's the current price
The meeting just happened
The bullet train from Beijing to Tianjin takes 33 minutes and the whole journey is 120km. Now it has covered one third of the journey
How long have you been driving
How much distance is left

First of all, determine whether it is driving at a uniform speed. If so, it's easy to say
1 / 3 journey takes 1 / 3 time: 33 * 1 / 3 = 11 minutes
The remaining 120 * (1-1 / 3) = 80km

What is the intersection of the line y = - 2x + B and y = 3x + 5-b with the x-axis B

Intersection with the X axis indicates that the Y coordinate reading is 0: let y = - 2x + B = 0 & y = 3x + 5-b = 0
The results are as follows: B = 2x & B = 3x + 5
Simultaneous equation: 2x = 3x + 5
If: - x = 5, then x = - 5
Substitution and test: B = 2x (when x = - 5) = - 10
B = 3x + 5 (when x = - 5) = - 10
If left and right are equal, the solution is obtained

Aunt Wang bought a total of 42.2 yuan of fruit. She bought 8 kg of apples. The unit price of apples is 3.25 yuan, and that of bananas is 4.50 yuan. How many kg of bananas do you buy?