Mark is 11 years older than his sister. in 8 years he will be twice as old as she will be then. how old are they now

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

Identify the polynomial. a2b - cd3 a.monomial b.binomial c.trinomial d.four-term polynomial e.five-term polynomial