The bookstore brought in a batch of story books. On the first day, they sold one package less than one sixth of these books. At this time, there are still seven eighths left unsold. How many packages of these story books have been sold

The bookstore brought in a batch of story books. On the first day, they sold one package less than one sixth of these books. At this time, there are still seven eighths left unsold. How many packages of these story books have been sold

3 packs
Let x packets in total, then
（X/6）-1=X/8
X = 24 bags
Then sell 24 / 6-1 = 3

The bookstore brought in a batch of story books. On the first day, they sold 1 bag less than 1 / 6 of these books. At this time, 7 / 8 of them remained unsold. How many of these story books are there?

1÷[1/6-(1-7/8)]
=1÷1/24
=24
A: there are 24 storybooks in this batch

Given three points a (0, - 1), B (2,3), C (3.5), prove that A.B.C three points are collinear

Vector AB = (2, - 4)
Vector BC = (1, - 2)
And because vector AB = vector 2BC
So the three points are collinear

As shown in the figure, the two diagonal lines AC and BD of the diamond ABCD intersect at point O, so that the diamond is divided into four triangles (1) along △ AOD
As shown in the figure, the two diagonal lines AC and BD of the diamond ABCD intersect at point O, so the diamond is divided into four triangles. (1) what are the four triangles? What is the relationship between them? (2) translate the triangle AOD along the AB direction to the length of AB, and the triangle cod along the CB direction to the length of CB, and make the translated figure. (3) after the above translation, what figure does the diamond ABCD become?

"Mo Yuanhua":
(1) These four triangles are right triangles. They are congruent right triangles
(2) The △ AOD moves to the lower left of △ BOC and the △ cod moves to the upper left of △ AOB (Figure omitted)
(3) After translation, the diamond becomes a rectangle (aooc)
Good luck and goodbye

If x > 100, the size of LG (lgx) is

If it's a multiple choice question or a fill in question, this question can be given a special value, such as x = 1000
LG x = 9 LG x = 6 LG (lgx) = Lg3 LG x > LG (lgx)

There is a child holding a bamboo pole to pass through a rectangular door. If the bamboo pole is placed vertically, it is 1 foot higher than the door. If it is placed obliquely, it is exactly equal to the diagonal line of the door. Given the width of the door is 4 feet, calculate the height of the bamboo pole and the height of the door

Let the gate height be x feet, then the bamboo pole length be (x + 1) feet. According to the Pythagorean theorem, we can get: x2 + 42 = (x + 1) 2, that is, X2 + 16 = x2 + 2x + 1, the solution is: x = 7.5, so the gate height is 7.5 feet, and the bamboo pole height is 7.5 + 1 = 8.5 feet

No matter what the value of X is, 3x ^ 2-ax + 8 = BX ^ 2 + 5x-c holds?
"-" is a minus sign and "X" is an unknown number

The result is (3-B) x ^ 2 - (a + 5) x + 8 + C = 0, because the balance holds, so B = 3, a = - 5, C = - 8. So the answer is 25

A triangle wheat field is 125 meters long at the bottom and 60 meters long at the height. The total yield of wheat is 2550 kg. What is the average yield per hectare?

2550÷（125×60÷2）×10000=6800

loga(b)×log(a)c＝?

Is it the base number or the true number in brackets?

On the polynomial of a, the square of a + (M + 1 / 2) a + 1 / 2m does not contain a linear term, so we can find the value of M
We need it in half an hour

The square of a + (M + 1 / 2) a + 1 / 2m does not contain a linear term
m+1/2=0
m=-1/2