Answer the following seperate questions

19a.) 6x-1=4

19b.) 4w+3=10

Evaluate when t = - 2

20a.) 5t-3

20b) the sequence 5+t, 5+2t, 5+3t, 5+4t ...

20c.) 18 - t²

20d) the sequence 2t - 3, 2t-5, 2t-7, 2t-9 ...

21.) Find the value of these expressions when p=2, q=3 and r=6

21a) 5q

21b) p+q

21c) qr

21d) 2p + 3q

21e) r²

19a.) 6x-1=4 - -> 6x=5 - -> x=5/6

b.) 4w+3=10 - -> 4w=7 - -> w=7/4

Evaluate when t = - 2

20a.) 5t-3 - -> 5 (-2) - 3 = - 10-3 = - 13

b) the sequence 5+t, 5+2t, 5+3t, 5+4t. = 3, 1, - 1, - 3

c.) 18 - t² = 18 - (-2) ^2 = 18-4=14

20d) the sequence 2t - 3, 2t-5, 2t-7, 2t-9. = - 7, - 9, - 11, - 13

21.) Find the value of these expressions when p=2, q=3 and r=6

21 a) 5q = 5 (3) = 15

b) p+q = 2+3 = 5

c) qr = 3*6 = 18

d) 2p + 3q = 2 (2) + 3 (3) = 4+9 = 13

e) r² = 6^2=36