What are the solutions of this system of equations ? O (-2, -1) and (4, 17)
O (-2, 11) and (4.-7)
O (2, -1) and (-4, 17)
O (2, 11) and (-4,-7)

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.