Answer:
7a+2a=9a
Step-by-step explanation:
You distribute the a to each of the numbers in the parenthesis. Which means that you multiply. You should be left with a 7a+2a. Then since 7+2=9, your answer is 9a. So answer 1 is correct because they do these exact steps.
Answer:
When the x-value is 0, the y-value will be the y-intercept.
Step-by-step explanation:
Hope this helps!
If not, I am sorry.
Answer:
your answer is .17. 2/12 on a calculator gets you .166 repeating,
Step-by-step explanation:
Finding the perimetre: 7x+4x-3+x=12x-3
Good luck!