1, given that the solution of equation 3x+a=2 is 5, the value of a is a,-13b,-17c, 13 D, 17.

2. It is known that the circumference of an isosceles triangle is 63cm, and an equilateral triangle with one waist as its side is 69cm, so the length of the base of an isosceles triangle is a, 23cm B, 17 cm C, 2 1 cm D, 6 cm.

3. In 2004, after the Indian Ocean tsunami, Xiaohong opened her savings box, took out her boasted pocket money and counted it. She found that 0 yuan and 2 yuan had 15 * * and * * 20 yuan money, so Xiaohong had 65438+A, 5 and 10 B in 0 yuan and 2 yuan respectively.

4. In the figure below, there are countless symmetry axes: A, equilateral triangle B, parallelogram C, isosceles trapezoid D and circle.

5. For data 2, 2, 3, 2, 5, 2, 10, 2, 5, 2, 3, the following statements are true: ① the mode is 2; ② The values of mode and median are not equal; ③ Median is equal to average; (4) The average value is equal to the value of the mode. a， 1 b，2 c，3 d，4

6. Among the following four regular polygons, A, B, C, D and hexagon cannot be covered by the same figure.

7. During the SARS period, a pharmacy increased the price of a drug by 100% in the case of shortage of antiviral drugs in the market. According to the investigation by the price department, the price increase is limited to 10% of the original price, so now the price of drugs is reduced by a, 45% B, 50% C, 90% D and 95%.

Fill in the blanks:

In 1.x=3 and x=-6, _ _ _ _ _ is the solution of the equation x-3(x+2)=6.

2. If x=-3 is the solution of equation 3(x-a)=7, then a = _ _ _ _ _ _

3. If the value of the algebraic expression is 1, then k = _ _ _ _ _ _ _

4. When x = _ _ _ _ _ _ the algebraic expression is equal to the value of.

5.5 The equation that the difference between 5.5 and x is 1 more than 2 times of x is _ _ _ _ _ _ _.

6. If 4a-9 and 3a-5 are opposite numbers, then the value of a2-2a+ 1 is _ _ _ _ _ _ _.

7. A project will be completed by Party A in m days, by Party B in 3 days, and the cooperation between Party A and Party B will take _ _ _ _ _ _ days.

8. Solve the equation, then x = _ _ _ _ _ _

9. The sum of three consecutive even numbers is 18. If the largest even number is X, the equation _ _ _ _ can be listed.

10. Pool A has 3 1 ton of water, and Pool B has 1 1 ton of water, and 2 tons of water flows into Pool B every hour. After x hours, there are _ _ _ _ _ _ _ _ tons of water in Pool B and _ _ _ _ _ _ _ _ tons of water in Pool A..

Answer:

1, it is known that +m=my-m. (1) When m=4, find the value of y. (2) When y=4, find the value of m. 。

Wang Qiang took part in the 3000m race. He ran a distance at 6 m/s and the rest at 4 m/s in 10 minutes. How many meters did Wang Qiang run at a speed of 6 meters per second?

Xiao Zhao and Xiao Wang had an exchange activity in the summer vacation. Xiao Zhao said, "I went to a week-long technology summer camp. The sum of the dates of these seven days is 84. Do you know what date I went out? " Xiao Wang said, "I went to my uncle's house for seven days during the holiday. The sum of the date and the number of months is 84. Guess what date I went home? " Try to list the equations and answer the questions of Xiao Zhao and Xiao Wang.

4. Please work out a practical problem with life study, so that the equation is 51-x = 45+x. 。

5. It is known that the solution of equation kx=4-x about X is a positive integer, so find the integer value that K can take.

Answer: