Answer:
£1.6
Step-by-step explanation:
£20 ÷ £2.3= 8 remainder 1.6
change= £1.6
1.60 euros
2.30 times 8 = 18.40
20-18.40 = 1.60
22m+4
Let's break it down:
13m+-1(-9m-4)
13m+(9m+4)
2/3 r²
40 = n-.40n
40 =n(1-.4)
40 = n(.6
divide by .6 on each side
40/.6 =n
n=66 2/3