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Pachacha [2.7K]
3 years ago
8

Alex collects stamps. She has 47 stamps in all. She has 20 stamps from europe. The number of african stapes is 2 times the numbe

r of asian stamps. How many stamps from each of these 3 countries she have use reasoning to write a numerical expression .
Mathematics
1 answer:
ryzh [129]3 years ago
4 0
47=20+(2x+y)
Let x represent the African stamps and y represent the Asian stamps.
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The volume of a box is 5x^3 + 20x^2 + 15x cm^3. If the height of the box is 5x cm, find the width and length of the box.
Annette [7]

Answer:

The product of the Width and Length is x^2 + 4x + 3 cm^2.

Step-by-step explanation:

The volume of a box = 5x^3 + 20x^2 + 15x cm^3.

Volume of a Box = W*L*H       [Width(W), Length(L), and Height(H)]

W*L*(5x) = 5x^3 + 20x^2 + 15x cm^3

W*L = (5x^3 + 20x^2 + 15x cm^3)/5x cm

W*L = x^2 + 4x + 3 cm^2

We know the area of the base of the box (W*L).  It is x^2 + 4x + 3 cm^2.

To find the actual width and length, we need to know one of the variables, L or W.  Without that, all we can say is that their product (W*L) is x^2 + 4x + 3 cm^2.

8 0
2 years ago
Identify all sets to which the number 3.1214122144 . . . belongs. Choose from irrational,rational,whole,and integer
CaHeK987 [17]
It is an irrational number. That is because rational numbers can be put into fractions. But because this decimal goes on forever, you can't put it into a fraction. This is also not a whole number or an integer. Whole numbers and integers do not have any decimals or fractions in them, but this number is a decimal. Therefore, this number is irrational.
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3 years ago
(b) ​E: A randomly selected person finding cheese revolting. ​F: A different randomly selected person finding cheese delicious.
Svet_ta [14]

Answer:

C

Step-by-step explanation:

b) option C

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because randomly selected events are mutually exclusive events.

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katrin2010 [14]

Answer:

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Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Plz help me i’ll give like 50 points!
Alenkasestr [34]

Answer:

We will be using the Pythagorean theorem for the first 2 and SOH CAH TOA for the other 3.

a^2 + b^2 = c^2

sin(t) = b/c;  cos(t) = a/c;  tan(t) = b/a

#4)  a^2 + 9^2 = (3sqrt(10))^2                    #5  9^2 + 27^2 = c^2

       a^2 + 81 = 90                                             81 + 729 = c^2

       a^2 = 9                                                       810 = c^2

       a = 3                                                          9sqrt(10) = c

#6    27 + 3 = 30                                        #9  cos(90) = 8/c

                                                                         8/-0.45 = c

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#7  8^2 + b^2 = 17^2                                 #8  2^2 + 15^2 = c^2

      64 + b^2 = 289                                          4 + 225 = c^2

      b^2 = 225                                                  229 = c^2

      b = 15  [not the exact value]                     15.3 = c  [not the exact value]

Sorry if something doesn't make sense and felt kind of rushed. Feel free to comment down below my answer if you have any questions and I'll try to clarify it the best I can.

8 0
3 years ago
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