Will mark brainliest if ! plz i don’t understand at all & missed a week of school because i was sick.

find m

23 degrees

Step-by-step explanation:

A straight line = 180 degrees, and there's a 90 degree angle on the left side, so (2x+14) + (x+7) = 90.

Then, just solve the equation.

3x + 21 = 90

3x = 69

x = 23

Therefore, m = 23 degrees

23 degrees

Step-by-step explanation:

A straight line = 180 degrees, and there's a 90 degree angle on the left side, so (2x+14) + (x+7) = 90.

Then, just solve the equation.

3x + 21 = 90

3x = 69

x = 23

Therefore, m = 23 degrees

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.