Ellie wants double her savings of £9000 by investing her money for 18 years what interest rate does she need to look for?

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

How to write four times a number, minus 6,is equal to theee times the number+8 as an equqtion

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)