The temperature at 3:00 PM was 35°F. The temperature dropped 45 degrees at 9:00 PM. What was the temperature at 9:00 PM? A: -45
B: -10
C: 0
D: 10

Having a hard time understanding this question (see attachment).

Which two transformations are applied to pentagon abcde to create a'b'c'd'e'? (4 points) translated according to the rule (x, y) ? (x + 8, y + 2) and reflected across the x-axis translated according to the rule (x, y) ? (x + 2, y + 8) and reflected across the y-axis translated according to the rule (x, y) ? (x + 8, y + 2) and reflected across the y-axis translated according to the rule (x, y) ? (x + 2, y + 8) and reflected across the x-axis

In a rectangle klmn, km = 6x + 16 and ln = 49. find the value of x