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Ksju [112]
3 years ago
10

Help me with 3, and 5 show your work !

Mathematics
1 answer:
blondinia [14]3 years ago
8 0

Answer:

3. 3

5.

Step-by-step explanation:

3.

\frac{( - 12) - (2)}{ - 7}  \\  =  \frac{ - 12 - 2}{ - 7}  \\  =  - \frac{ - 14}{ - 7}  \\  = 2

5. \\  \frac{ - 6 \times 2}{ - 4}  \\   =  \frac{ - 12}{ - 4}   \\  =  - 3

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Answer:

Initial costs 750 and loses .28 of value each year, so still worth 1-.28=.72 of value at start of next year. 750*(.72)^n is the value after n years since for n=0, new, it is 750*.72^0=750*1=750, and after 1 year it is worth 750*.72^1=750*.72 means it lost 28% value after one year. If you with to express it as an exponential exp(..) you need to convert the .72^n into exp(log(.72)*n)=exp(-.3285*n) so you get

750*exp(-.3285*n) as the value after n years.

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number from 1 to 99 is written on a card making a pack of 99 cards. What is the probability of randomly selecting a card where t
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