1. Giải phương trình a) 2(x - 1) = 3(1- x) ; b) (x – 1)(5x + 4) = 0
2. Một người đi xe đạp từ A đến B với vận tốc 15 km /h. Lúc về người đó đi với vận tốc 12km/h nên thời gian về lâu hơn thời gian đi là 45 phút. Tính quãng đường AB ?
3. Cho tam giác ABC vuông tại A, đường cao AH.
a) Chứng minh rằng: Tam giác ABC đồng dạng với tam giác HAC.
b) Gọi M và N lần lượt hình chiếu của điểm H lên cạnh AB, AC.
Chứng minh AM. AB = AN. AC

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average

The table showed price paid per concert ticket on a popular online auction site. what was the average price paid per ticket