Answers on page 13 of the math workbook for the first year of junior high school

I sent it, you have to give me extra points.

2.= (5/3 * 5/3 * 5/3) * (5/3 * 5/3 * 5/3 * 5/3).

8) five-thirds.

Five-thirds to the power of 8.

3.(1) = 5 to the 8th power (2) = two-thirds to the 13th power (3) = 2 to the 12th power (4) a to the 15th power (5) (x-y) to the 10th power (6) (-a) to the 15th power.

4.(1) = the 7th power of a + the 7th power of a = 2 (the seventh power of a) [It means 2 times the seventh power of a. I won't explain it next] (2) = 10a + a to the 10th power (3) = x to the 6th power + x to the 6th power = 2 (x to the 6th power) (4) = (2x to the 7th power) + (2x to the 7th power) = 0

It's a big question about the matching.

4, square 5, cone 6, cuboid.

7. Main view Left view 8. Main view Left view.

Greatly satisfied?

Is it a package? Question 4, the same 5 questions Cone 6 questions I don't know 7 questions Can't draw 8 questions Same as above.

5.Use the A-type pumping machine that can pump tons of water per minute to pump the pool, and it can be pumped in half an hour; If you use a B-type pump, it is estimated that it can be pumped in 20 to 22 minutes. How many more tons of water per minute does a Type B pump approx to a Type A pump?

Solution: Let type B pump about x tons of water per minute more than type A.

Obtained from 1: x<

Obtained by 2: x>

So the solution set of the group of inequalities is x>

A: Pump about a ton of water per minute.

6.The label of a drug reads: "60 120 mg per day, taken in 3 divided doses," what is the dosage range of this medicine at one time?

Solution: If the dose of this medicine is X mg at one dose, then it can be obtained from the title:

60≤3x≤120

So, easy to get: 20 x 40

Write it yourself well, and don't ask the teacher.

Write well yourself!! I won't ask all the textbooks!!

Solution: If A has x sheep, then B has (x-2) sheep.

x+1=2(x-2-1).

x+1=2x-4-2

x=-7x=7, so B has x-2=5 sheep.

Answer: A has 7 sheep and B has 5 sheep.

The first question: 360 degrees 8=45 degrees.

Second question: 360 degrees 15=24 minutes.

I forgot to bring the book, do you have a title?

Is it the seventh grade book of the people's education version?

If yes, the answer is as follows:

Since the two sides are equal, the equation is listed first, and then the denominator is passed, that is, both sides are multiplied by 15, and 15x-5(x-1)=105-3(x+3) is reduced to 15x-5x+5=105-3x-913x=91x=7

x-(x-1)/3=7-(x+3)/5

The least common multiple is 15, so we get: 15x-5(x-1)=15*7-3(x+3) 15x-5x+5=105-3x-9 13x=91 x=7

Shediphantus lived to be x years old.

Questions related to it:

Rubber type 1Lifespan of Diophantus:

Solution: x=1 6x+1 12x+1 7x+5+1 2x+4x=25 28x+9

x-25/28=9

3/28x=9

Beam pants guess x=9*3 28

x=84Answer: From this, it can be seen that Diophantus lived to be 84 years old.

The second solution:

Answer: The answer is the greatest mutuality in "12", "6", and "7".

The product of the factors – "12 7=84".

2.The age at which Diophantus started to be a dad:

84 (1 6 + 1 12 + 1 7) + 5 = 38 (years) Answer: The age at which Diophantus started becoming a father was 38 years old.

3.The age of Diophantus at the time of his son's death:

84-4=80 (years).

A: The age of his son at the time of his death was 80 years old.

Solution, set the area that needs to be painted in each room is x. (8x-50) 3-(10x+40) 5=10 x=52