Good at math came in to help me repeatedly!!

Updated on educate 2024-05-26
13 answers
  1. Anonymous users2024-02-11

    It should be 495+495+5+5, () borrowed from your parents.

    Or the 970 used to buy shoes + 10 yuan to return to parents + 20 yuan in your own hands.

    According to your algorithm, you only spent 270 words on shoes.

    Aren't you 720 more

  2. Anonymous users2024-02-10

    495 to Dad, 495 to Mom, 495 495 = 990. But why add your own 20 dollars?

  3. Anonymous users2024-02-09

    You have $20 left over for yourself, so you still owe $490 to mom and dad. Although you paid back 5 yuan each to your parents, it was also your parents' money.

    I don't understand if you ask again, I think I'm confused again.

  4. Anonymous users2024-02-08

    The 20 yuan is also owed to Mom and Dad, which is a duplicate. It should be calculated like this: each owes 495 yuan to his parents, and he repays 10 yuan, a total of 1,000.

  5. Anonymous users2024-02-07

    Why would you add your own 20 blocks = 1010

  6. Anonymous users2024-02-06

    5 yuan for Dad, 5 yuan for Mom, 495 for Dad, 495 for Mom, 495 for 495, 495 495=990, bought a pair of leather shoes.

  7. Anonymous users2024-02-05

    It should be 495 + 495 + 10 (10 yuan owed to parents), or 970 yuan used to buy shoes + 10 yuan to return to parents + 20 yuan in your own hands.

  8. Anonymous users2024-02-04

    The question is wrong, it should be that the speed of car B is 3 5 of car A, because car A walks longer than car B, so car A is faster.

    Solution: If the distance from the meeting place to station B is x, and the speed of car A is v, then there is:

    x+100) v=x ((3 5)v), about v, and the total road length is l=2x+100=400 km.

  9. Anonymous users2024-02-03

    Extend FA, CB intersect at point O, connect FC.

    From the meaning of the title, we know that the quadrilateral FABC and the quadrilateral FEDC are congruent, so CFA= CFE, A= E, B= D, BCF= DCF, in the triangle ABO, OBA= OAB, so A= B, so A= D.

    In the same way, b= e, c= f

  10. Anonymous users2024-02-02

    Hexagon equality is a regular hexagon, then the six angles are all equal, all equal to 120 degrees.

  11. Anonymous users2024-02-01

    29 + 29 + 16 = 74 cm.

    20 + 20 + 16 + 16 = 72 cm mausoleum.

    20 + 20 + 29 = 69 cm leaky bridge.

    There are three types of use of the return to Wang Meng.

  12. Anonymous users2024-01-31

    + 8^(-x) = 2^3x + 2^(-3x)[2^x+2(-x)]^2=2^2x + 2^(-2x) +2 = a^2

    2^2x + 2^(-2x) = a^2-2[2^2x + 2^(-2x)]*2^x+2^(-x)) = 8^x+8(-x) +2^x+2^(-x) = a(a^2-2)

    So 8 x+8(-x) = a(a 2-2) -a2 x+y=12 xy=9 x（x^1/2-y^1/2）/（x^1/2+y^1/2）=(x^1/2-y^1/2)^2/（x^1/2+y^1/2）* x^1/2-y^1/2)

    x+y-2(xy) 1 2) (x-y)(x-y) 2 = (x+y) 2 - 4xy, x-y < 0 The rest of the substitution is fine.

  13. Anonymous users2024-01-30

    1.The cube sum formula: a 3 + b 3 = (a + b) * (a 2 - ab + b 2).

    8^x+8^(-x)=(2^x)^3+[2^(-x)]^3=[2^x+2^(-x)]*a^2-2+1)=a*(a^2-1)

    2.(x 1 2-y 1 2) (x 1 2+y 1 2) = (x-y) (x+y+2 root number xy) = (root number 3) 3

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