Math Problems Help out

Aren't these two questions the same question?

There are 6 jiao stamps and 8 jiao stamps totaling 68 yuan, of which 6 jiao stamps are 20 more than 8 jiao stamps, how many stamps are there in each of these two stamps?

Solution: 6 jiao = yuan 8 jiao = yuan.

There are x stamps for 8 jiao stamps and (x+20) stamps for 6 jiao stamps.

x=40

then x+20=60

A: There are 60 stamps for each 6 jiao and 40 stamps for 8 jiao. Thank you.

The 6 jiao stamps are 20 more than the 8 jiao stamps, and the money number is:

20 yuan) a 6-jiao stamp and an 8-jiao stamp as a group, then each group has: yuan) how many groups are there?

Then the stamps of 8 corners are 40 sheets, and the stamps of 6 corners are: 40 + 20 60 (sheets) A: omitted.

Solution: Set 6 corners with x sheets.

Solution x = 606 corners 60 sheets 8 corners 40 sheets.

There are x sheets in 6 corners and y sheets in 8 corners. Yields: x-y=20. Let's figure it out for ourselves.

There are x sheets for 6 corners and y sheets for octagonal corners.

x=y+20

x=60y=40

.4x+12=68 x=40 y=60

x is octagonal and y is hexagonal.

Hello! Centimeter.

Cubic centimetre.

v=(π×h×x²)/3=s×h×1/3

Because v=32, s=12, h=3 v s=8, because the cylinder and the cone are equal in height at the bottom, so.

Cylindrical volume = s h = 12 8 = 96

The difference in volume between the two: 96-32=64. That is, the cone is 64 cubic centimeters less than the cylinder.

From the stove bucket [sold at a price reduction of 20 per piece, the result is an average of 10 more pieces per day than before the price reduction], it can be seen that an average of 25 pieces are sold per day after the price reduction.

List the equations for liquid arguments.

b * 15 * 30 - a * 15 * 30 = 22500 original) b (1-20%) * 25 * 30 - a * 25 * 30 = 22500 after the price reduction).

a=50b=100

The process of understanding the trouble, this topic is not very difficult.

Total God Hood Profit Before Price Reduction: (Vertical Hunger B-A).

Total profit after price reduction: (

The system of recurrent equations can be solved a=50 and b=100

7.The right limit is equal to 1, the left limit is equal to 0, and the limit does not exist. I choose D2. The right limit is equal to 0, so k=0The selection can be guided to be continuous, a+b=4The only answer that meets is A

Solution 1 1 x <-1

1/x+1<0

1+x)/x<0

Equivalent to (1+x)*x<0

So the solution set is -1-x

i.e.: x>-1

So the solution set is -1

When x > 0, 1 x <-1 is multiplied by x, multiplied by a positive number, and the sign is unchanged, i.e., 1<-x

So x<-1 but contradicts x>0 and is discarded.

When x < 0, 1 x <-1 is multiplied by x, multiplied by a negative number, and the sign is changed by 1>-x

So x>-1 binds x<0

Get -1

3l correct solution.

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