Find the midpoint of the line segment joining the points P = (-7,1) and Q = (5,-7)

  (-1, -3)

Step-by-step explanation:

The midpoint coordinates are the average of the respective end point coordinates:

  M = (P +Q)/2

  M = ((-7, 1) +(5, -7))/2 = (-7+5, 1-7)/2 = (-2, -6)/2

  M = (-1, -3) . . . . the midpoint of PQ

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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answer: when you burn wood, the carbon reacts with the oxygen in the air to create ash and smoke. that is a permanent change you cannot undo that.

step-by-step explanation: