How do you say your ruler in English

How do you say your ruler in English

your ruler

Is this his ruler? No, not in English?

Is this his ruler
No,it isn't

The greatest common factor of two numbers is 14, and the least common multiple is 84. There are several groups of such books. Please list them

84÷14＝7
7＝1×7
There is only one set of such numbers
1×14＝14
7×14＝84

In △ ABC, a, B and C are the three sides of the triangle, if the perimeter of △ is 18cm, and a + B-C = 2cm, a: C = 1:2
Try to find the length of each side of △ ABC

a+b+c=18 1)
a+b-c=2 2)
a=c/2 3)
1) - 2)
2c=16
c=8cm
Substituting 3), we get
a=4cm
b=18-8-4=6cm

The greatest common factor of the two numbers is 9, and the least common multiple is 243______ And______ ．

9 = 3 × 3243 = 3 × 3 × 3 × 3, these two numbers are 9 and 243, so the answer is: 9243

If the line y = k1x-2 and y = k2x + 7 intersect at a point on the x-axis, then K1: K2 =_________ .

If the line y = k1x-2 and y = k2x + 7 intersect at a point on the x-axis
Let y = 0
k1x－2＝k2x＋7=0
k1x=2,k2x=-7
Division
k1:k2=-2/7

Plural of half

When forming the plural, the nouns ending in y but before y as the consonant, first remove y and then add ies: baby, babies, baby, country, countries, fly, flies, lady, ladies. 2 when forming the plural, the nouns ending in y but before y as the vowel, directly add s: boy, boys, day, day

The parabola C of a given quadratic function y = ax ^ 2 + BX + C passes (- 5,0)
It is known that the image parabola C of quadratic function y = ax & # 178; + BX + C passes through (- 5,0), (0,5 / 2), (1,6) three points, and the analytic expression of line L is y = 2x-3
① Finding the function relation of parabola C
② To prove that parabola C is independent of straight line L
③ If there is only one common point P between the straight line y = 2x + m parallel to L and the parabola C, the coordinates of point P are obtained
Especially the third question, thank you very much

(1) Because the parabola passes (0,5 / 2), so C = 5 / 2, that is, the parabola equation is y = ax & # 178; + BX + 5 / 2; after substituting (- 5,0), (1,6) two points, we get 25a-5b + 5 / 2 = 0, that is, 10a-2b + 1 = 0. (1) a + B + 5 / 2 = 6, that is, 2A + 2b-7 = 0. (2) (1) + (2), we get 12a-6 = 0, so a = 1 / 2, B = 3; then we get the solution of parabola

It is known that the n power of 3 plus the m power of 11 is divisible by ten. It is proved that the 4 N power of 3 plus the 2 m power of 11 is divisible by ten

11 ^ m is 1,3 ^ n + 11 ^ m = 10K
Then, the mantissa of 3 ^ n should be 9, that is, n = 2 + 4P, P = 0,1,2
3^(4n)=(3^4)^n=81^n
3 ^ (4N) + 11 ^ (2m) = not divisible by ten

F (x) = LNX + x ^ 2-2ax + A ^ 2 has monotone increasing interval on [1 / 2,2]. Try to find the value range of real number a

f'(x)=1/x+2x-2a
As long as there is x ∈ (1 / 2,2) such that f '(x) > 0, i.e. 1 / x + 2x-2a > 0
A0 g (x) single increase x