PLZ HELP ME ASAP.. Which is the correct algebraic expression after combining like terms?

6 cd+ 3 c- 7 d- 3 cd+ 4d+ 1/3 c
- 3cd+ 2 2/3c - 11d
- 3cd+3 1/3c- 3d
- 9cd+ 2 2/3c- 3d
- 9cd+ 3 1/3c- 3d

What is the equation and solution for the sentence? the sum of a number and thirty-one is one hundred thirteen. write the equation as n-31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and add 31 to both sides. the answer is 144. write the equation as n-31=113 and add 31 to both sides. the answer is 144.

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Consider the expression below. 9 + 4(x + 2) – 3.1 select the term that best describes "3" in the given expression. o a. coefficient variable exponent constant