What is the value of x?

x = 18

Step-by-step explanation:

sum of interior angles of a polygon is determined by the formula

(n - 2) · 180° where 'n' is the number of sides the polygon has

there are 5 sides in this problem so the number of degrees is 3 · 180 = 540°

we can get the sum of all 5 angles and set it equal to 540

3x + 23 + 9x - 6 + 7x - 4 + 90 + 95 = 540

19x + 13 + 185 = 540

19x + 198 = 540

19x = 342

x = 342/19 = 18

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.

the area of the rectangle is 35units^2.

step-by-step explanation:

graph it and find the distance.

it is a 5*7 rectangle.

therefore the area is 35units^2.