16. Translate this to algebraic expression: Six more than twice a number.

a. a+6

b. 2a+6

с. За+6

d. 4a+6

17.Determine the word phrases of this algebraic expression:
5 (3d - 13) = 45.

a. The product of thirteen less than thrice a number d, and five will result to
forty-five

b. The product of 5 and 3d minus 13, the answer is 45.

c. 13 minus 3d times 5, the result is 45

d. The answer is 45 of 3d-13 times 5

18. Translate the phrases: The sum of a number and five is twelve.

a. 5+12

b. 12+5

c. 12a+5

d. a+5=12

19. Identify the variable of this algebraic expression: 13f + 2g

a. f

b. g

c. f and g

d. f and 2

20. A _is any letter or symbol that represents a number.

a. algebra

b. variable

C. equation

d. expression

please help​