What's the profit margin of 80 yuan goods sold at 100 yuan____ %

What's the profit margin of 80 yuan goods sold at 100 yuan____ %

Cost profit margin: (100-80) / 80 * 100% = 25%
Sales profit margin: (100-80) / 100 * 100% = 20%

If the purchase price of a commodity is 150 yuan and the sales price is 165 yuan, what is the profit margin of the commodity?

Let the profit margin be x%
150×（1＋x%）＝165
150＋1.5x＝165
1.5x＝15
x＝10
A: the profit margin is 10%

A simple calculation of 31.3% 1 × 41.2% 1 minus 11.3% 1 × 41.2% 1 × 2 minus 9.5% 11.3% 1

31 and 3 1 × 41 and 2 1 minus 11 and 3 1 × 41 and 2 1 × 2 minus 9.5 × 11 and 3 1
=(31 1 / 3-11 1 / 3) × 41 1 / 2 × 2-2 / 19 × 3 / 34
=20 × 41 and 1 / 2 × 2-3 / 323
=830-107 2 / 3
=722 1 / 3

If the point P (x, y) is in the second quadrant, and x = 5, y = 3, then the coordinates of the point P symmetrical about the origin are?

(5, 1, 3)

Minus two and seven eighths minus two and one fourth minus three and one half plus one and one eighth
Minus two and seven eighths minus two and one fourth minus three and one half plus one and one eighth

-2 and 7 / 8-2 and 1 / 4 - (- 3 and 1 / 2) + (- 1 and 1 / 8)
=-2 and 7 / 8-2 and 1 / 4 + 3 and 1 / 2-1 and 1 / 8
=-2 and 7 / 8-1 and 1 / 8-2 and 1 / 4 + 3 and 1 / 2
=-(2 7 / 8 + 1 1 / 8) + (- 2 1 / 4 + 3 1 / 2)
=-4 + 1 and 1 / 4
=-2 and 3 / 4

If f (x) is a quadratic function and satisfies f (2 + x) = f (2-x), the function has two zeros x1, X2, then X1 + x2 = ()

f(2+x)=f(2-x)
therefore
Axis of symmetry x = (2 + X + 2-x) / 2 = 2
Because there are two zeros x1, X2, then X1 + x2 = 2 × 2 = 4

Numbers and five elements? Are the numbers of trees 1 and 2 or 3 and 8?!

The numbers of "a" and "B" are 1 and 2

For the derivation of Ln (a), a = the x power of a plus the x power of B plus the x power of C. thank you

=a~xlna+b~xlnb+c~xlnc/a~x+b~x+c~x
First the total derivative, then the derivative of A

6: 5 = what percentage = what percentage = () what percentage of 2.24 is equivalent to 9 / 4 of 36 and the first and second problems of mathematics p77 in Volume I of grade 6
Before 9:30 this evening

6: 5 = [6 / 5] = [120]%
[50 / 7] of 2.24 is equivalent to 4 / 9 of 36

If a ^ 2x ^ 3 + ax ^ 2-4x ^ 3 + 2x ^ 2 + X + 1 is a quadratic polynomial about X, then a + 1 / A

a^2x^3+ax^2-4x^3+2x^2+x+1
=(a-4)x^3+ax^2+2x^2+x+1
Is a quadratic polynomial of X
a-4=0
a=4
a+1/a=17/4