The temp at a mountain base camp was -5 degrees Celsius on Wednesday. Thursday morning the temp was 2 degrees lower than it was on Wednesday. by Thursday evening the temp was 1 degree Celsius lower than it was that morning. What was the temp at Thursday morning. A.-9
B.-8
C.-7
D.-6

My favorite songstress gives away 25% of this side of her signature fragrance collection to her charity last month her sales were 1200 how much of her sales did she donate

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.