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sweet-ann [11.9K]
3 years ago
13

Imagine the United States only had two postage stamps, a 3 cent stamp and a 7 cent stamp. If you can put any number of stamps on

an envelope that you want, what amounts of postage can and cannot be paid for?
Mathematics
1 answer:
cricket20 [7]3 years ago
7 0

Answer:

  • not possible:  1, 2, 4, 5, 8, 11
  • possible: all others

Step-by-step explanation:

Obviously, all multiples of 3 and 7 can be paid.

1 cent can be added by adding a 7-cent stamp and taking away two 3-cent stamps. 2 cents can be added by adding three 3-cent stamps and taking away one 7-cent stamp. Hence any value more than 7 +2(3) = 13 cents can always be accommodated.

Amounts that are impossible:

  1, 2, 4, 5, 8, 11 cents

All other positive integer amounts are possible.

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5n - 1 < 24 is the inequality in question.  Add 1 to both sides, obtaining:

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3 years ago
What linear equation is represented by the table? 1
rewona [7]

Answer:

Y=4x-2

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You have to try it (x,y) (2,6)

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3 years ago
Please answer this question now
Alexeev081 [22]

Answer:

Area = 400.4 m^2

Step-by-step Explanation:

Given:

∆UVW,

m < U = 33°

m < V = 113°

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Area of ∆UVW

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Find side length UV using Law of Sines

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U = 33°

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w = UV = ?

\frac{29}{sin(33)} = \frac{w}{sin(34)}

Cross multiply

29*sin(34) = w*sin(33)

Divide both sides by sin(33) to make w the subject of formula

\frac{29*sin(34)}{sin(33)} = \frac{w*sin(33)}{sin(33)}

\frac{29*sin(34)}{sin(33)} = w

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Find the area of ∆UVW using the formula,

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= \frac{29*30*sin(113)}{2}

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3 years ago
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Answer:

Tell me if i am wrong. :)

Step-by-step explanation:

To solve for y:

Q.1   2x + y = -1

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3 0
3 years ago
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