One number is 10 more than twice another

Question

one number is 10 more than twice another

a.what is their sum?

b.what is their product

Answer 1

m = 2n + 10

 

(a)

 

m + n = (2n + 10) + n = 3n + 10

 

(b)

 

mn = (2n + 10)n = 2n² + 10n