The sum of andre and brandon's scores on a math quiz is 180. andre's score is 2 times as much as 30 less than brandon's score. find each student's quiz score.

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?