Question

Se stie ca a= 11 si b+ c=8 . Calculati : 
B) 2a+ 3b + 3c =
C) 10a+ 9b+ 9c = 
D) ab+ac+25
E) ab +ac- 34 
F) 7b + 7c + 9a

Answer 1

a=11
b + c = 8

B) 2a + 3b + 3c = 2a + 3 (b+c) = 2* 11 + 3 *8 = 22 + 24 = 46

C) 10a +9b + 9c = 10 *11 + 9 * 8= 110 + 72 = 182

D) ab + ac - 34 = a(b+c) - 34 = 11 * 8 - 34= 88- 34 = 54

e) 7b + 7c + 9a = 7 (b+c) + 9 * 11= 7 * 8 + 99= 56 + 99 = 155