Write an algebraic expression
twice the sum of 15 and a number
ans: 2(a+15)
Correct.
To write an algebraic expression for "twice the sum of 15 and a number," you can follow these steps:
1. Assign a variable to represent the unknown number. Let's use "a" for this example.
2. Write an expression for the sum of 15 and the number "a." This would be "a + 15".
3. To get "twice" the sum, multiply it by 2. So, the final algebraic expression would be "2(a + 15)".