Question

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
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Answer 1

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