2x+10=0
subtract 10 from both sides
2x=(-10)
divide 2 from both sides
x=-5
Answer: 6 years
Step-by-step explanation:
Formula to calculate compound amount:
, where P= Principal , r=rate of interest, t= time
Given: P = £400, r = 3% = 0.03 , A= 475
Required equation: 

Taking log on both sides , we get

Hence, he needs to invest the money for 6 years to get atleast £475.
5n=20 is the equation 5 times n equals 20
Answer: 3 and -5
Step-by-step explanation:
45, 33, 22, 12,
differences =
45-33 = 12
33-22=11
22-12=10
pattern = decreases by one so
12- 9 = 3
3- 8 = -5
Answer: It looks like this expression is 16+2 times 36, so the answer is 18 times 36 also 88, they are both equivalent