Which would the phrase "twice the sum of a number and three" look
like as a variable expression?
question 9 options:
a. 2n+3
b. 2(n+3)
c. 2+ (2n+3)
d. 2(2n-3)

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]