Yesterday morning, the temperature was -11. The temperature increased 7 by noon and then decreased 4 by nightfall. What was the temperature at nightfall last night?

Carrie and krystal are taking a road trip from greenville each person has her own map carry in north valley or each person has her own map in the scales on the maps are different and carries map read about in northville are 4.5inches apart the scale on a map is 1 inch equals 20 miles how far is greenville from north valley

What is the slope of a line that is perpendicular to y = 3x + 1

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?