Resolver las siguientes inecuaciones de segundo grado y determine si hay una o más soluciones: x2 + 2X + 2 > - 1 x2 - 1 - X < -1 ayudenme pliss

The sum of two numbers is 86, and their difference is 20. find the two numbers

△abc is similar to △xyz. also, side ab measures 6 cm, side bc measures 18 cm, and side xy measures 12 cm. what is the measure of side yz ? enter your answer in the box.

The ages of personnel in the accounting department of a large company are normally distributed with a standard deviation of 7 years. there is a 0.02275 probability that the age of any randomly chosen person in the department is less than 22 and 0.15866 probabilty that the age of any randomly chosen person is greater than 43. what is the mean of this distribution?