3x+6×2.5=16-x

3x+6×2.5=16-x

3x+15=16-x
4x=1
X = quarter

The surface area of a cylinder is 18.84 square decimeters, the diameter of the ground is 2 decimeters, and how high is the cylinder

The radius is one decimeter
The bottom area is 1 × 1 × 3.14 = 3.14 square decimeters
18.84 - 3.14 × 2 = 12.56 square decimeters, which is the lateral area
12.56 ÷ (2 × 3.14) = 2 decimeters, which is the height of the cylinder

It is known that a / B / C / D / E / F / g / h / L / K represents ten different natural numbers greater than 0. To make the following equation hold, a minimum is (). B + C = a, D + e = B, e

a=b+c
=d+e+e+f
=g+h+2h+2i+i+k
=g+3h+3i+k
It is known that a, B, C, D, e, that is, F, G, h, I and K represent ten different natural numbers greater than 0, so to make a minimum, that is, G + 3H + 3I + K minimum, only 3H + 3I minimum, assuming that h and I are 1 and 2 respectively, and because H + I = e, G and K cannot be 3, as analyzed above, G and K cannot be 5, and G and K minimum can only be 4 and 6
So the minimum of a is 19
Is that the problem?

If the solution set of 6x-a4x-1 is x0 B.A = 0 C.A

B
x

0 multiplied by any number will get 0, 0 divided by any number will get 0, any number multiplied by or divided by 1 will get this number, which sentence is wrong?

It's wrong to divide 0 by any number, because it can't be divided by 0

X + y = - 2, xy = 3

X + y = - 2, then y = - 2-x
Xy = 3, that is, X (- 2-x) = 3, X & # 178; + 2x + 3 = 0
Because B & # 178; - 4ac = 4-12

In an integer subtraction formula, the sum of the subtracted, the subtracted and the difference is 28,
If the difference is two fifths of the subtraction, then the subtraction is（

Subtraction + difference = 28 △ 2 = 14
Subtraction = 14 (1 + 2 / 5) = 10

Please summarize your question here (X & # 178; - 2x) / (2Y XY) = x (X-2) / [y (2-x)] = - x (X-2) / [y (X-2)] = - X / y. what is it when x = - 1, y = 2
(X & # 178; - 2x) / (2Y XY) = x (X-2) / [y (2-x)] = - x (X-2) / [y (X-2)] = - X / y. when x = - 1, y = 2, how much is it

Solution
Just put it in
The original formula = - X / y = - (- 1) / 2 = 1 / 2

On tree planting day, students of a certain school go to plant trees. If each student plants 6 trees, they can only complete 34% of the original number of trees. If each student improves the efficiency of planting trees by 50%, they can plant 40 more trees than the original plan. Please ask the number of people participating in the planting and the number of trees originally planned

Suppose the number of people participating in tree planting is x, and the number of trees originally planned to be planted is y. according to the meaning of the question: 6x = 34y6 × (1 + 50%) x = y + 40, the solution is: x = 40y = 320. Answer: the number of people participating in tree planting is 40, and the number of trees originally planned to be planted is 320

When a = what, the value of the algebraic formula 2a-3 (a + 1 / 3) is nonnegative

2a-3(a+1/3)>=0
Solving inequality
2a-3a-1>=0
So a