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Ksenya-84 [330]
3 years ago
9

Simplify the following expressions by using the order of operations

Mathematics
1 answer:
MariettaO [177]3 years ago
5 0
11. 6 + 5 * 2 + (-3)
      6 + 10 - 3
      16 - 3
       13 <==

12. 67 + 84 - 12 * 4 / 16
      67 + 84 - 48/16
      67 + 84 - 3
      148 <==

13. -5 * -6 - 25/5 - 2
      30 - 5 - 2
       23 <==

14. 18 - (9 + 3) + 2^3
       18 - 12 + 8
        14 <==

15. -24 / -6 * 2
       4 * 2
       8 <==

16. 8 [ (26 + 10) - 4(3 + 2)]
      8 [ (36 - 4(5)]
      8 [ 36 - 20 ]
      8 [ 16 ]
        128 <==

17. 6 * 3 / 9 * 2 + 1
       18/9 * 2 + 1
        2 * 2 + 1
        4 + 1
        5 <==

18. (9 - -4)(-8 - -7)
      (9 + 4)(-8 + 7)
       13 * -1
       -13 <==
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Answer:

1679.60\ km^2

Step-by-step explanation:

-We can use the exponential decay function to estimate the size after 13 years:

P_t=P_oe^{-rt}

Where:

P_t is the size after t years, t is the time, r is the rate of decay and P_o the original size.

#We substitute and calculate as:

P_t=P_oe^{-rt}\\\\=4600e^{-13\times 0.0775}\\\\=1679.60

Hence, the forest covers 1679.60\ km^2 after 13 years.

4 0
3 years ago
A restaurant offers a special pizza with any 4 toppings. If the restaurant has 15 topping from which to choose, how many differe
OlgaM077 [116]

Answer: 1,365 possible special pizzas

Step-by-step explanation:

For the first topping, there are 15 possibilities, for the second topping, there are 14 possibilities, for the third topping, there are 13 possibilities, and for the fourth topping, there are 12 possibilities. This is how you find the number of possible ways.

15 * 14 * 13 * 12 = 32,760

Now, you need to divide that by the number of toppings you are allowed to add each time you add a topping.

4 * 3 * 2 * 1 = 24

32,760 / 24 = 1,365

There are 1,365 possible special pizzas

8 0
3 years ago
Fill in the blank 43_ _ _54
Oksana_A [137]

Answer:

The answer is add 4.

Step-by-step explanation:

I know this because if you add 4 to 43 that's 47 so that's 1 of the blanks. Add another 4 that's 51. that's another 1. and that's last one is add 4 which makes 54.

Hope this helps.

6 0
2 years ago
Plz plz plz plz plz plz plz plz plz plz
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12 girls for every 5 boys
boys is second so it shouldb be indenomenaotr (bottom)

girls/boys

12girls/5boys=2.4girls/boy

answer is B

6 0
3 years ago
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Answer:  

11/9

hope this helped :)

Step-by-step explanation:

4 0
3 years ago
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