The number of minutes Sadie spends on homework, playing outside, and practicing
piano are known. How much more time Sadie spends on homework, h, is unknown.
90 = (20 + 15) +h

h = 55

Step-by-step explanation:

90 = (20 + 15) +h

90 = 35 + h

90 - 35 = h

h = 55

not enough information

step-by-step explanation:

we cannot know this, because the other students could have handed out 10 flyers, or they could have handed out 100. one way, the mean would go up, and another way, the mean would go down.

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.