The angles in a pentagon are in a ratio of 7: 6: 5: 5: 4. find the measure of the smallest angle

Solve : (show your work) 10-3x> -23

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

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