Question

(iv) 3a - 5b, given that a = 7, b = 4​

Answer 1

Answer:

3a-5b

3×7-5×4

21-20

1 is answer

Answer 2

Answer:

1

Step-by-step explanation:

$a = 7 \: b = 4 \: \\ 3a - 5b \\ 3 \times 7 - 5 \times 4 \\ 21 - 20 \\ 1$