What is the median of 90, 91, 92, 95, 97, 94, 95, 99______ ．

What is the median of 90, 91, 92, 95, 97, 94, 95, 99______ ．

This group of data from small to large is: 90, 91, 92, 94, 95, 95, 97, 99, then the median is: 94 + 952 = 94.5

What is the median, seven numbers 87.5,92,96,95,89100,98.5 how to find the median

Arrange the seven numbers from small to large, and the one in the middle is the median
87.5,89,92,95,96,98.5,100
The median was 95
If the given data is even, the median is equal to the average of the two numbers in the middle

What is the median and mode of 94 75 70 94 80 97 93 92 95 91?

Put the digits in order
70、75 、80、91 、92 、93、94 、94 、 95 、 97
Median: (92 + 93) / 2 = 92.5
Mode: 94

As shown in the figure, AB is parallel to CD, ad is parallel to BC. If angle B = 70 degrees, what is the degree of angle D?

∵AB∥CD
The two straight lines are parallel and the inner angles of the same side are complementary
∵AD∥BC
The two straight lines are parallel and the inner angles of the same side are complementary
∴∠D+∠A＝∠B+∠A
∴∠D＝∠B
∵∠B＝70
∴∠D＝70

As shown in the figure, ab ∥ CD, ad ∥ BC, ∠ a = 3 ∥ B. calculate the degree of ∥ a, ∥ B, ∥ C, ∥ D

∵ ad ∥ BC, ∥ a = 3 ∥ B, ∥ a + ∥ B = 180 °, i.e. 4 ∥ B = 180 °, the solution is ∥ B = 45 °, ∥ a = 3 ∥ B = 3 × 45 ° = 135 °; ∥ ab ∥ CD, ∥ a + ∥ d = 180 °, ∥ B + ∥ C = 180 ° - ∥ a = 180 ° - 135 ° = 45 °; ∥ C = 180 °- ∥ B = 180 ° - 45 ° = 135 °. Answer: the degrees of ∥ a, ∥ B, ∥ C, ∥ D are 135 °; 45 °; 150 °; 45 ° respectively

As shown in the figure, AB is parallel to CD, ad is parallel to BC, two times of angle A and three times of angle c complement each other, and the degrees of angle A and angle D are calculated
 

∵AB∥CD,
∴∠C+∠B=180°,
∵AD∥BC,
∴∠A+∠B=180°,
∴∠A=∠C,
And ∵ 2 ∠ a + 3 ∠ C = 180 °,
∴∠A=∠C=36°
∴∠d=180°-∠A=144°
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It is known that as shown in the figure, ∠ C = ∠ 3, ∠ 2 = 80 °, 1 + ∠ 3 = 140 °, a = ∠ D, calculate the degree of ∠ B

∫∠ C = ∠ 3, (known) ∫ EF ‖ BC. (equal position angle, two lines are parallel) ∫ 1 + ∠ 2 = 180 ° (two lines are parallel, the inner angle of the same side is complementary) ∫ 2 = 80 ° (known) ∫ 1 = 100 °∫ 1 + ∠ 3 = 140 ° (known) ∫ 3 = 40 °∫ a = ∫ D ∫ ab ‖ CD (internal angle is equal, two lines are parallel) ∫ B = ∫ C = ∠ 3 = 40 °

As shown in the figure, ∠ 1 = 12 ∠ 2, ∠ 1 + ∠ 2 = 162 °, calculate the degree of ∠ 3 and ∠ 4

From the known ﹥ 1 = 12 ﹥ 2, ﹥ 1 + ﹥ 2 = 162 °, the solution is as follows: ﹥ 1 = 54 °, ﹥ 2 = 108 °. ﹥ 1 and ﹥ 3 are opposite vertex angle, ﹥ 3 = ﹥ 1 = 54 °, ﹥ 2 and ﹥ 4 are adjacent complementary angle, ﹥ 4 = 180 ° - ﹥ 2 = 72 °

As shown in the figure, angle 1 = angle 2, angle d = 50 ° to find the degree of angle B
 

It is known that the ratio of the two angles is 7:3, and their difference is 72 degrees. What are the degrees of the two angles?
1. The clothing store sells two kinds of clothing, one is 360 yuan per piece, and the profit is 10%. The other is 540 yuan per piece, and the loss is 10%. If you receive one of these two kinds of clothing, please calculate, is it a loss or a profit?
2. Draw a circle with a radius of 4cm in a rectangle with a length of 32cm and a width of 16cm. How many circles can you draw at most? What is the sum of the areas of these circles?
3. At present, the concentration of 25% brine is 100g. How many grams of salt need to be added in order to prepare 40% brine?

1. 7-3 = 472 ／ 4 = 18 (degrees) 18 × 7 = 126 (degrees) 18 × 3 = 54 (degrees) 2, 360 ／ (1 + 10%) = 327 and 11 / 3 (yuan) 540 ／ (1-10%) = 600 (yuan) 600 + 327 and 11 / 3 = 927 and 11 / 3 (yuan) 360 + 540 = 900 (yuan) 900 ＜ 927 and 11 / 3, so it is a loss of 3, 4 × 2 =