1. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: s + 7 * 2. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: 5r - 4 *

3. if r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: t - s *

4 .If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: u + r *

5. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: 11t - 7 *

6. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: 6 + 3u *

7. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: 4r - 10s *

8. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: (r with an expnent of 2 +8)

9. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: *

30 over r

10.If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: *2t with an exponent of 2-18

1. s + 7 = 9

2. 5r - 4 = 21

3. t - s = 5

4. u + r = 6

5. 11t - 7 = 70

6. 6 + 3u = 9

7. 4r - 10s = 0

8. r with an expnent of 2 +8 =

9. 30 over r = =6

10. 2t with an exponent of 2-18 =

Step-by-step explanation:

1. If r = 5, s = 2, t = 7, and u = 1 then,

s + 7  = 2 + 7 = 9

2. If r = 5, s = 2, t = 7, and u = 1 then,

5r - 4  = 5(5) - 4 = 25 - 4 = 21

3. if r = 5, s = 2, t = 7, and u = 1 then,

t - s  = 7 - 2 = 5

4 .If r = 5, s = 2, t = 7, and u = 1 then,

u + r  = 1 + 5 = 6

5. If r = 5, s = 2, t = 7, and u = 1 then,

11t - 7  = 11(7) - 7 = 77 - 7 = 70

6. If r = 5, s = 2, t = 7, and u = 1 then,

6 + 3u = 6 + 3(1) = 6 + 3 = 9

7. If r = 5, s = 2, t = 7, and u = 1 then,

4r - 10s = 4(5) - 10(2) = 20 - 20 = 0

8. If r = 5, s = 2, t = 7, and u = 1 then,

r with an exponent of 2 +8 =  

9. If r = 5, s = 2, t = 7, and u = 1 then,

30 over r =

10.If r = 5, s = 2, t = 7, and u = 1 then,

2t with an exponent of 2-18 =

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.