The price of a commodity is reduced by 8%, and it is sold at the original price. The profit margin is 10% higher than before? If the purchase price of a commodity is reduced by 8%, it will be sold at the original price, and the profit margin will be increased by 10%? Please explain the specific meaning, such as 1 + X

Let the original profit rate be x, then (1 + x) - (1-8%) = (1-8%) (x + 10%), and the solution is x = 15%

If the purchase price of a commodity is 250 yuan and the profit margin is 15.2% when it is sold at a 10% discount on the marked price, then the marked price of each commodity is 100 yuan______ ．

Suppose the price of each item is x yuan, X × 90% = 250 × (1 + 15.2%), and the solution is x = 320

Profit margin is also a common percentage problem. Stores always expect to make a profit when they sell goods,
The price at which goods are purchased from the manufacturer is called ()

Profit margin is also a common percentage problem. Shops always expect to make a profit when they sell goods. Generally, the price of goods purchased from the manufacturer is called (purchase price)

What is the limit of LNX when x approaches zero
But the answer is a huge number. Maybe the answer is wrong

It's infinitesimal

8 / 15 + 5 / 12-2 / 5 + 7 / 12, those that can be easily calculated can be easily calculated

Original form
=(8 / 15-2 / 5) + (5 / 12 + 7 / 12)
=2 / 15 + 1
=17 out of 15

Factorization of (xsquare-1) (ysquare-1) - 4xy

（x^2-1)(y^2-1)-4xy
=(xy)^2-x^2-y^2+1-4xy
=[(xy)^2-2xy+1)]-(x^2+y^2+2xy)
=(xy-1)^2-(x+y)^2
=(xy-1+x+y)(xy-1-x-y)

-6 √ 7 times 1 / 3 √ 21 divided by 2 √ 3

-6√7×1/3√21÷2√3
=-2√147÷2√3
=-√49
=-7

If the points a (- 4, - 3), B (2,7) are known, then the equation of the circle with the diameter of line AB is,

（-4+2)/2=-1
(-3+7)/2=2
Center (- 1,2)
Diameter d = AB = √ [(- 4-2) &# 178; + (- 3-7) &# 178;] = 2 √ 34
r=√34
So (x + 1) ² + (Y-2) ² = 34

How to solve the equation with 0.4 × 25-5x = 8

0.4×25-5X=8
10-5X=8
5X=10-8
5X=2
X=2÷5
X=0.4

Given the set M = {X-1 ≤ x < 2}, n = {x-x-a ≤ 0}, if M ∩ n = empty set, then the value range of a is

Set n = {x-x-a ≤ 0},
So x ≤ a
Because - 1 ≤ x < 2
And m ∩ n = empty set
So a < - 1