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notsponge [240]
3 years ago
14

Stock A changed by - $2,60 during the day. Stock B changed by 3

Mathematics
1 answer:
Slav-nsk [51]3 years ago
5 0

Answer:

$7.80

Step-by-step explanation:

$2.60 * 3 = $7.80

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carbon-14 has a half-life of 5730 years. The formula f(t)=(1/2)^t/5730 give the percentage of carbon-14 left in the item after t
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2 years ago
I have $25 all in nickels and dimes. There are twice as many Nickles as dimes. How many of each are there?
Mama L [17]

Answer:

N=250

Step-by-step explanation:

 "twice as many nickels as dimes"     means    N =2D     [eq1]

 "collection of nickels and dimes is worth $25"    means

        5N + 10D = 2500      [eq2]

   (To avoid using decimal points, PLZ express everything in cents.)

Substitution   (substitute N from eq1 into eq2]:

     5(2D) + 10D = 2500

      10D + 10D = 2500

          20D = 2500

            D = 125

      N=2D         [eq1 again]

      N=2(125)

      N=250

Check:

  Is   5(250) + 10(125) = 2500   ?

        1250 +  1250 = 2500   ?

          2500 = 2500   ?yes

7 0
2 years ago
The differences between a number and 12 is 20
Alika [10]
X-12=20
x=20+12
x=32

answer is 32
3 0
3 years ago
Please help!!!
abruzzese [7]
1)51 2)91 3)79 :)))))0
4 0
2 years ago
——-GIVING 45 POINTS——<br><br> How many dots belong in the electron dot diagram of a boron atom?
Vikki [24]

Answer:The answer is eight electrons

Step-by-step explanation:

7 0
2 years ago
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