Q. Translate this verbal expression into an algebra"The sum of twice a number and 31."
Denote unknown number as 'n': Let's denote the unknown number as 'n'. The phrase "twice a number" means we multiply the number by 2, so we have 2n.
Multiply number by 2: Next, we add 31 to the expression of twice a number, which gives us 2n+31.
Add 31 to expression: There are no further operations or simplifications needed, so the algebraic expression for "the sum of twice a number and 31" is 2n+31.