How much is one of 85 multiplied by 69 and then multiplied by 85 (simple)

How much is one of 85 multiplied by 69 and then multiplied by 85 (simple)

How much is one of 85 multiplied by 69 and then multiplied by 85 (simple)
= 69x 85 ÷ 85
= 69
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348533 times 3495?

28,165,335

How many Mu is 45 meters by 69 meters

3105 square meters, about 4.6575 mu
1 mu = 666.667 square meters

Some junior high school mathematics problems, solution. Speed. Urgent
1. X ^ 2 + y ^ 2 = 8.25, X-Y = 1.5, then (XY) ^ 4=
2. If X-1 = 1 / N ^ 2, then x ^ 2-2x / N ^ 2 + 1=

(X-Y) & sup2; = x & sup2; + Y & sup2; - 2XY = 6.25, X & sup2; + Y & sup2; = 8.25, ∧ xy = 1, (XY) ^ 4=
1；
x^2-2x/n^2+1= -x²+2x+1

As shown in the figure, it is known that the line y = 2x + 4 intersects with the x-axis at point a, intersects with the y-axis at point B, and point P is on the coordinate axis, and Po = 240. Then the area of △ ABP is______ ．

When point P is on the positive half axis of X axis, s △ ABP = s △ AOB + s △ OBP = 12 × 2 × 4 + 12 × 4 × 240 = 484; when point P is on the negative half axis of X axis, s △ ABP = s △ obp-s △ AOB = 12 × 4 × 240-12 × 2 × 4 = 476; when point P is on the positive half axis of Y axis, s △ ABP = s △ oap-s △ AOB = 12 × 2 × 240-12 × 2 × 4 = 236; When p is on the negative half axis of Y axis, s △ ABP = s △ OAP + s △ AOB = 12 × 2 × 240 + 12 × 2 × 4 = 244

In order to meet the "June 1" International Children's day, the supermarket decided to take appropriate price reduction measures. According to the market survey, if the price of each child's clothing is reduced by 4 yuan, then an average of 8 more children's clothing can be sold every day. (1) if you want to sell this kind of children's clothing every day If the profit is 1600 yuan, how much should each children's clothing be reduced? (2) The calculation shows that when the price of each piece of children's clothing should be reduced by how much yuan, the supermarket's clothing counter will make the biggest profit by selling this kind of children's clothing every day?

(1) Suppose that every piece of children's clothing should be reduced by X Yuan. From the meaning of the question, we can get: (50-x) (20 + X4 × 8) = 1600. From the solution, we can get: X1 = 10, X2 = 30; from the test, we can get x = 10, 30. Answer: every piece of children's clothing should be reduced by 10 or 30 yuan. (2) suppose that the total sales profit is y yuan, and every piece of children's clothing should be reduced by X Yuan A: the price of each children's clothing is 20 yuan. The biggest profit is 1800 yuan

1. In △ ABC, ab = AC, the center line BD on AC divides the perimeter of the triangle into two parts of 24 cm and 30 cm, and calculates the three sides of the triangle
2. The sum of a couple's ages is six times the sum of their children's ages now, ten times the sum of their children's ages two years ago, and three times the sum of their children's ages six years later. How many children do the couple have?

1. 2AB+BC=54
Bc-ab = 6 or ab-bc = 6
AB = AC = 16 BC = 22 or AB = AC = 20 BC = 14
2. The sum of parents' age is a, the sum of children's age is B, and there are x children
A=6B
A-4=10*(B-2X)
A+12=3*(B+36X)
X=3