The value of 40-x / 40 = x / 60 x

The value of 40-x / 40 = x / 60 x

40 * 120-3x = 2x (multiply both sides by 120)
4800-3x = 2x (simplification)
4800 = 5x (x moves to the right)
X=4800/5
X=960

(1) (x-1)*60=(x+1)*40

(x-1)*60=(x+1)*40
60x-60=40x+40
60x-40x-60=40
20x=40+60
20x=100
x=5

If there are two two digits, the greatest common factor is 9 and the least common multiple is 360, then the sum of the two digits is ()
Urgent!

Two two digit numbers, their greatest common factor is 9, and their least common multiple is 360,
360÷9=40
40=1×40=5×8
The two numbers can be: 1 × 9 = 9 and 40 × 9 = 360
Or 5 × 9 = 45 and 8 × 9 = 72
So the sum of these two numbers is 369 or 117

Given that the slope of line L1 is 1 / 2, line L2 passes through points m (3a, - 4), n (0,2a), and L1 / / L2, find the value of A

Because L1 ‖ L2
∴K1=K2
Let L2 be y = 1 / 2x + B
Bring in M and N coordinates
-4=3a/2+b
2a=b
a= -8/7
b= -4/7

3.Is this （ ）apple tree?No,（ ）tree is（ ）orange tree.
A.an,a,theB.a,the, anC.an ,the, anD.the ,the,an

C. an, the, an
The first letter of apple and orange are both vowels, so we should use an. The second empty table refers to it, so we use the
Is this an apple tree? No, it's an orange tree

If the vertex of the parabola y = 3x ^ + MX + 9 is on the Y axis, then the value of M is

According to the vertex coordinate formula:
(- B / 2a, (4ac-b) & # / 4A) and the vertex is on the y-axis
Then: - M / 6 = 0
So m = 0

In number theory, 300, 243, 205 △ a (a is a natural number greater than 1) get the same remainder, a =?
The three numbers 300, 243 and 205 △ a (a is a natural number greater than 1) get the same remainder, a =?
The sum of the three remainders of 63, 91 and 129 is 25, n =?
Question 3 11 What is the remainder of 11 (a total of 2007) 1 / 13?

(1）300-243=57,243-205=38,300-205=95,
(57,38,95)=19,
a=19.
（2）63+91+129-25=258,
258=2*3*43
n=43
（3）111111/13=8547
2007/6=334.3
111/13=8.7
So the remainder is 7

Mathematical problems of hyperbola in Senior Two
The eccentricity of hyperbola is equal to 2, and it has the same focus as ellipse x ^ 2 / 25 + y ^ 2 / 9 = 1

Ellipse: C = 4
So hyperbola: C = 4, e = C / a = 2 = 4 / A, a = 2, B = 2 √ 3
The hyperbolic equation is: x ^ 2 / 4-y ^ 2 / 12 = 1

Factorization, multiplication and division in mathematics of grade two

Given a / b = B / C = C / A, find the value of a + B-C / A-B + C. The result is 1

If x is a real number, compare the size of 2x ^ 2-7x + 5 and x ^ 2-3x?

2x^2-7x+5-（x^ 2-3x）=x^2-4x+5=(x-2)^2+1>0
So 2x ^ 2-7x + 5 > x ^ 2-3x