Answer:
£11.22
Step-by-step explanation:
100% = £13.20
50% = £6.60
10% = £1.32
5% = £0.66
so you would add 10% and 5% together which gives you 15% and 15% is £1.98
and then you could to £13.20 - £1.98 which equals to £11.22
Answer:
4x (4)
Step-by-step explanation:
Given : 


\left(\sqrt{13}+\sqrt{11}\right)\left(\sqrt{13}-\sqrt{11}\right)







Therefore, correct option is 
Y = -2x - 1
y = 3 - x - 1......y = 2 - x
2 - x = -2x - 1
-x + 2x = -1 + 2
x = 1 <==