A + b = 15 ..... eq 1
a – b = 12 ...... eq 2
So a = 15 – b
Substitute in eq 2 :
15 – b – b = 12
15 – 2b = 12
–2b = 12 – 15
b = 1.5
So a = 15 – 3/2 = 13.5
4ab = 4 x 13.5 x 1.5 = 81
U should do like this... But sry I don't know third part
Step-by-step explanation:
1. 3x+y+17=0
2.x-y+3=0
Sorry mam I use mental math
Answer:
abcyou
Step-by-step explanation:
The answer is c for this problem
