Question

Please Help! Will give 15 points!!!

4. Find the sum of (0.75x - 12y) and (-5 + 6y - 0.5x)


Show each step of your work.




5. Which expression(s) is/are equivalent to 8-2(5x-3). Show your work to justify your decision.


a. 6(5x-3)


b. 8-10x+6


c. 8-(10x-6)


d. 8-10x-6


e. -10x+14





6. In math class, students are attempting to simplify the expression written on the board: 7 - 2 (3 - 8x)


Three students make an attempt at a first step:


Len writes: 5 (3 - 8x)


Monty writes: 7 - 2 (-5x)


Nailany writes: 7 - 6 - 16x


Do you agree with any of the students? Explain your reasoning for each one.

Answer 1

yo i only got number 4 for you but here it goes.......: 0.70x+18y-5

Explanation:

(0.75x - 12y) + (-5 + 6y - 0.5x)

regroup to the variables : (0.70x-0.5x) + (12y+ 6y-5)

put it together: (0.70x)+(18y-5)

you cant add unlike terms so you remove the parenthesies and your done.