If a two digit number is equal to three times the product of its single digit number and ten digit number, and the ten digit number is 2 less than the single digit number, then the two digit number is zero____ (to calculate the process) Urgent need! Ask friends to help! OK, I will add points!

If a two digit number is equal to three times the product of its single digit number and ten digit number, and the ten digit number is 2 less than the single digit number, then the two digit number is zero____ (to calculate the process) Urgent need! Ask friends to help! OK, I will add points!

Let X be the number in ten and (x + 2) be the number in one
10x+x+2=3x（x+2）
3x^2-5x-2=0
(3x+1)(x-2)=0
X = - 1 / 3, or x = 2
Because x needs to be a positive integer, x = 2
The double-digit number is 24

A two digit number, its ten digit number is x, and the single digit number is y. if you transpose the ten digit number and the single digit number, you will get a new two digit number. Please calculate the sum and difference between the new number and the original number. And answer, can this sum be divided by 11?

Original number 10x + y, new number 10Y + X
Then and 11x + 11y can be divided by 11, and the result is x + y
The difference is 9y-9x or 9x-9y

The difference between adding es or s after English words

Plural after original + es, plural after consonant + S

Given that r = 4cm, H = 10cm, how much more surface area will be increased if the cylinder is cut in half along the diameter of one bottom surface of the cylinder?

The surface area increases the area of two rectangles of diameter × height
4 × 2 = 8 cm, diameter
8 × 10 = 80 cm and 178;, increasing the area of a rectangle
80 × 2 = 160 cm and 178; the total increased surface area is 160 cm and 178;

The greatest common factor and the least common multiple of 12 and 48

12,48

In the triangle ABC, ab = 3, AC = 4, BC is odd, find the perimeter of the triangle ABC

Let BC be of length x, because the sum of the two sides of a triangle is greater than the third side
x+3>4,x>1
x

It is known that the sum of two natural numbers is 54, and the difference between the least common multiple and the greatest common divisor is 114

Let two natural numbers be x and y, then x = AB, y = CB, and it can be seen from the question that a, B, C are all positive integers, then AB + CB = 54 = B (a + C) = 2 × 3 × 9, abc-b = 114 = B (ac-1) = 2 × 3 × 19, because a, B, C are all positive integers, so B may be 2 or 3 or 6. After the test, B is 2 or 3, a, C has no positive integer solution. So B can only be 6, so a = 4, C = 5. So x = AB = 24 & nbsp; & nbsp; Y = CB = 30. A: the two numbers are 24 and 30 respectively

How to verify by calculation that when K1 * K2 = - 1, two straight lines are vertical

Let the slope of line L1 be K1, L2 be K2, the intersection of two lines be m, then the line L1 will be translated, L2 make the intersection m coincide with the origin, then the slope will not change, and the linear equation is y = K1X + B, y = k2x + B. if they pass through the origin, the linear equation is y = K1X, y = k2x, and the angle between X axis and X axis is A1, A2, then they pass through the point (0,0) (1, K1) (0,0)

The plural form of a potato is

I'm glad to be able to answer your question here
some potatoes
The plural of "potato" is "potato plus es"

It is known that the analytic formula of parabola C 1 is y = 2x2-4x + 5, and parabola C 2 and parabola C 1 are symmetric about X axis. The analytic formula of parabola C 2 is obtained

Parabola C2 and parabola C1 are symmetric about X axis, the abscissa is constant, and the ordinate is opposite to each other, that is - y = 2x2-4x + 5. Therefore, the analytical formula of parabola C2 is y = - 2x2 + 4x-5