If x = a, y = B is a solution of the equation 2x = y = 0, find the value of 6A + 3B + 2 (the most detailed process)

If x = a, y = B is a solution of the equation 2x = y = 0, find the value of 6A + 3B + 2 (the most detailed process)

2x=0
x=0
a=0
y=0
b=0
therefore
6a+3b+2=2

If x = a, y = B is a solution of the equation 2x-y = 0, find 6a-3b + 2

Substitute x = a, y = B into the equation 2x-y = 0 to get 2a-b = 0
so
6a-3b+2
=3(2a-b)+2
=0+2
=2

Y = - 3x squared + 6x-2
Determine the axis of symmetry and vertex coordinates of the following functions by formula method

a=-3,b=6,c=-2
x=-b/2a=-(6)/2×（-3）=1
y=(4ac-b²)/4a
=(24-36)/(4×（-3））
=-12/(-12)
=1
Namely
The axis of symmetry is x = 1
Vertex coordinates are (1,1)

How to calculate 420 / 35

Divide 35 into five times seven, divide it by seven and then divide it by five

The set of all positive and negative rational numbers is called rational number set

No, and 0, 0 is the boundary between positive and negative rational numbers

When k = (), the distance from the corresponding point on the number axis to the origin of the solution of the equation 3x-2k = 1 about X is 3 units?

Substituting x = 3 into 3x-2k = 1
9-2k=1
2k=9-1
k=4
Substituting x = - 3 into 3x-2k = 1
-9-2k=1
2k=-10
k=-5

There are three rectangular pools of a, B and C, with square bottom and side lengths of 2m, 3M and 5m respectively. Put two piles of pebbles into the two pools of a and B, and the two pools will rise by 6cm and 8cm respectively. If two piles of pebbles are sunk into the pool of C, how many cm will the pool of C rise?

The volume of two piles of pebbles is: 2 * 2 * 0.06 + 3 * 3 * 0.08 = 0.96m3
So, put all of them into C, and the water rises: 0.96 / (5 * 5) = 0.0384m = 3.84cm

General term formula for finding an in sequence (an) a1 + A2 + a3 +... + an = 3 ^ n + 2

According to the meaning of the title
S1=a1=5
Sn=3^n+2
S(n-1)=3^(n-1)+2
an=Sn-S(n-1)=3^n-3^(n-1)=2*3^(n-1) (n>=2)
an=2*3^(n-1) (n>=2)
a1=5

For a column of numbers, the first three are 1, 9, and each of them is the remainder of the sum of the three adjacent numbers in front of it divided by 3. What is the number 1999 in this column?

（1999-3）÷13=153… 71999 is the seventh in the cycle section, which is 0. A: the number 1999 in this column is 0

Simple calculation of 8 / 7-15 / 7 × 8 / 7