Abox contains 20 different balls numbered from 1 to 20 (different balls have different numbers). at each step, we select a ball uniformly at random, record the number on it, and put it back in the box. this experiment is repeated 10 times. find the probability that all the numbers recorded were distinct.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

steve should create a type of business report called a business plan. the correct option among the options that are already given in the question is the last or the fourth option. this business report created by steve will actually influence the investors about investing their money in steve's business. this business report will have all the details about the business, the amount of investment required and the amount of expected profit.

where is the picture

step-by-step explanation: