B. -2
C. 2
D. -6
Answer:
Step-by-step explanation:
let the number be x
=7+x
=3(7+x)
=3(7+x)-2
13=3(7+x)-2
solving for x we have
13=21+3x-2
21+3x-2-13=0
collect like terms we have
21-2-13+3x=0
6+3x=0
6=-3x
x=6/-3
x=-2
The answer is B
B. -2
To solve this problem we have to first identify the data that we need and is important. You can arrange it like this:
Current Cost of Cereal: $3.39
CPI: 289.7
To find the cost of a box of cereal in 1983 we will need to use the following formula:
Cost in Base Year = Current Cost/CPI*100
Replace the data in the formula and we get the following:
1983 = 3.39/289.7*100
In 1983 the cost of a box of cereal was $1.170176044
I hope this helps, Regards.