1. Natasha invests £250 in a building society account. At the end of the year her account is
credited with 2% interest. How much interest had her £250 earned in the year?
Solution: Interest = 2% of £250
= 2/100 x £250
answer = £5
2. Alan invests £140 in an account that pays r% interest. After the first year he receives £4.20 interest. What is the value of r, the rate of interest?
r/100 x £140 = £4.20
r = 100 x 4.20 / 140
= 420/140
= 3%
So the interest rate is 3%
So you're suppose to isolate the variable by dividing each side by factors that don't contain the variable.
Which equals or at least.. Makes x = −
4
____
I hope this helps, as always. I wish you the best of luck and have a nice day, friend..
Answer: 45/4 = 11 1/4
Step-by-step explanation:
