Answer:
This problem requires us to calculate, the value of investment after 10 and 25 years, and also tell the time after which intial investment amount will double. Investment rate and initial investment amount is given in the question.
Value of investment after 10 year = 2000(1+7%)^10 = $ 3,934
Value of investment after 25 year = 2000(1+7%)^25 = $ 10,855
Time after which investment amount double (n)
4000 = 2000 (1.07)^n
Log 2 = n log 1.07
n = 10.2 years
Answer:
y = 0.75x + 1.95
Step-by-step explanation:
It is given that the variables:
y stands for total cost
x for the amount of songs.
It is also given that each song costs $0.75 to download, and that there is a standard flat-fee of $1.95 (per month).
Set the equation:
total cost for the month = cost per song * amount of song + flat fee subscription
or
y = 0.75x + 1.95
~
3f(-2)-4f(2)
Multiply a positive and a negative equals a negative: (+)×(-)=(-)
-3f×2-4f×2
Calculate the product
-6f-4f×2
-------------‐-------
-3f×2
Multiply a negative and a positive equals a negative: (-)×(+)=(-)
-(3×2)f
Multiply the numbers
-6f
-----------------------------------------------
-6f-8f
Collect like terms
-14f
ANSWER:-14f
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