Given the function y = Y1 + Y2, and Y1 = 2x + m, y2 = 1-m-1 + 3, the ordinate of the intersection of two function images is 4 1) Finding the functional relation of Y with respect to X

Given the function y = Y1 + Y2, and Y1 = 2x + m, y2 = 1-m-1 + 3, the ordinate of the intersection of two function images is 4 1) Finding the functional relation of Y with respect to X

(1) When m = 2, Y1 = 2x + M = 2x + 2, y2 = x + 3, y = Y1 + y2 = 3x + 5. When m = 3, Y1 = 2x + M = 2x + 3, y2 = x + 3, y = Y1 + y2 = 3x + 5. When m = 3, Y1 = 2x + M = 2x + 3, y2 = (1 / 2) x + 3, y = Y1 + y2 = (5 / 2)

-3X²+4X+1=0

What are you doing? Solving equations?
-3x²+4x+1=0
3x²-4x-1=0
x={-(-4)±√[(-4)²-4×3×(-1)]}/(2×3)
x=(4±√28)/6
x=[4±√(4×7)]/6
x=(4±2√7)/6
x=(2±√7)/3
x1=(2+√7)/3、x2=(2-√7)/3

It is known that the positive proportional function y = KX passes through the point P
If the line y = x + 4 intersects with the X axis at the intersection of point a and Y axis B, the area of triangle OAB will be? Soon

Let x = 0 and y = 4
So B (0,4)
Let y = 0, then x = - 4
So a (- 4,0)
The area is 1 / 2 × 4 × 4 = 8

The simplest method to solve this system of linear equations of two variables
I'm not sure how to write it, because there's this part in the topic I'm going to talk about on Monday
｛4a-2b-6=6 36a+6b-6=6

The first formula is multiplied by 3, that is, 12a-6b-18 = 18, which is the third formula
If you want to add the second and third formulas, that is to say, adding on the left side of the equation is equal to adding on the right side of the equation, that is: 48a-24 = 24, get a = 1, bring in any formula, and get b = - 4

Why is the resistance r not equal to 1? In U-I image, the slope angle is 45

If the ordinate is 0,2,4,6,8 and the abscissa is 0,1,2,3,4, the slope is tan45 = u / I, but not equal to 1

Factorization of (a square - a) square + 4 (A-2) (a + 1) - 4

(a square - a) square + 4 (A-2) (a + 1) - 4
=（a²-a)²+4(a²-a-2)-4
=(a²-a)²+4(a²-a)-8-4
=(a²-a)²+4(a²-a)-12
=[(a²-a)-2][(a²-a)+6]
=(a²-a-2)(a²-a+6)
=(a+1)(a-2)(a²-a+6)

There are five Saturdays and four Sundays in October of a certain year. October 1 of this year is ()
A. Monday B. Tuesday C. Wednesday D. Thursday

October has 31 days, and 31 = 4 × 7 + 3, so this month has 4 weeks and 3 days. We can use the hypothetical method to calculate the first Saturday of this month: (1) if October 1 is a Saturday, then October 2, 9, 16, 23 and 30 are all Sundays, and there are 5 Sundays, which is not consistent with the meaning of the title; using the same method, we can calculate that October 2 is not a Saturday (2) If October 3 is a Saturday, then October 4, 11, 18 and 25 are Sundays, which are exactly four Sundays. If you push back, you can know that October 1 is a Thursday

Teach me how to calculate,
20% of 15000 points = 3000 points, then 4.50% off 3000 points = 1350 yuan
In other words, 1350 yuan = 3000 points, how much is 3000 yuan?
I don't know how to calculate. It's hard to calculate every time. If you know, teach me how to calculate. Teach me the formula

15000 points 20% = 3000 points, then 3000 points to give 4.5% discount = 1350 yuan, that is 1350 yuan = 3000 points, that 3000 yuan is how many points? Do not know how to calculate, it is difficult to calculate every time, know to teach me to calculate, teach me formula problem 1.15000 points 20% = 3000 points, by finding a number of several points is how little, is to use multiplication

What day is October 1st, 2013?

It's a Tuesday

It's better to make it clear, or I can't understand it

y: X = K (definite) total: efficiency = time