Question

7. Let a and b be two integers and * represent
the operation a *b = 4a + 5b-9.
Example:
2*3 = 4 x 2 +5 X 3-9= 8 + 15-9 = 14
Find:
(ii) 3+ 4
(i) 7*2
(iii) -4*7
(iv) -1*4
(v) 20
(vi) 3*-5​

Answer 1

Answer:

20 maybe ans...........