3.5(c-8)+c = 12.5
⇒ 3.5c- 3.5*8+ c= 12.5 (distributive property)
⇒ (3.5c+ c) -28= 12.5
⇒ 4.5c= 12.5+ 28
⇒ 4.5c= 40.5
⇒ c= 40.5/ 4.5
⇒ c= 9
The correct answer is 9~
Answer:
65%
Step-by-step explanation:
formula is (og(original) price - sell price ÷ og price)*100
820-287=533
533÷820=0.65
0.65x100=65
65%
If each years cumulate an increase of 1100 dollars, then the cost after 22 years will be the base cost (27000) plus 22 increases (22*1100), for a total of

This relates to arithmetic series as follows: a series is arithmetic if, given a starting element
, every next element is given by adding a fixed number, called common difference,
. So, the first terms are
So, you can see that the element
is obtained by adding n times the common ratio to the starting element.
Since the element
represents the cost after n years, we are interested in the element

As we had already calculated.
Answer:
5.5
Step-by-step explanation:
3(2x-3)=24
first, isolate the variable. this means that you get rid of the three outside of the parenthesis

2x-3=8
Now you have the variable and another number. To get rid of 3, do the opposite of subtracting.
2x=11
Divide 11 by 2 and you have 5.5 :)