The temperature saturday is -13°, and on sunday it is -4°. which equation would be used to show the difference in temperature from saturday to sunday?

a. -4 + 13
b. -4 - (-13)
c. -4 - 13
d. 4 + (-13)

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

One positive number is 9 more than twice another. if their product is 95, find the numbers

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)