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gregori [183]
3 years ago
5

Marci mailed nine letters at the post office. Each letter weighed 3.5 ounces. What was the total weight of the letters

Mathematics
2 answers:
oee [108]3 years ago
8 0

all the letters weighed 31.5 ounces.

aivan3 [116]3 years ago
5 0

The total weight of the letters equals 31.5 ounces

Multiply 3.5 by 9

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Suppose that, on a 3,000-mile New York to Los Angeles flight, United Continental, American, and Southwest flew a total of 270 em
allsm [11]

Answer:

The number of empty seats each of these three airlines carried on its flight are as follows:

United Continental = 150 empty seats

American = 50 empty seats

Southwest = 70 empty seats

Step-by-step explanation:

Note: This question is not complete. The complete question is therefore provided before answering the question. See the attached pdf for the complete question.

The explanation of the answers is now provided as follows:

Let U, A and W represents number of empty seats of United Continental, American, and Southwest respectively. Therefore, we have:

U + A + W = 270 ………………………. (1)

Since United Continental had three times as many empty seats as American, this implies that:

U = 3A ………………………………… (2)

Substituting U = 3A into equation (1), we have:

3A +A + W = 270

4A + W = 270

W = 270 - 4A ………………………….. (3)

For the cost, we have:

3,000[((14.90 / 100) * 3A) + (14.60A / 100) + (12.40W / 100)] = $114,990

((14.90 / 100) * 3A) + (14.60A / 100) + (12.40W / 100) = $114,990 / 3,000

((14.90 / 100) * 3A) + (14.60A / 100) + (12.40W / 100) = 38.33

0.447A + 0.146A + 0124W = 38.33

0.593A + 0.124W = 38.33 ………………… (4)

Substituting W = 270 - 4A from equation (3) into (4) and solve for A, we have:

0.593A + 0.124(270 - 4A) = 38.33

0.593A + 33.48 - 0.496A = 38.33

0.593A - 0.496A = 38.33 - 33.48

0.097A = 4.84

A = 4.84 / 0.097

A = 49.8969072164948

Rounding to a whole number, we have:

A = 50

Substituting A = 50 into each of equations (2) and (3), we have:

U = 3 * 50 = 150

W = 270 - (4 * 50) = 70

Therefore, the number of empty seats each of these three airlines carried on its flight are as follows:

United Continental = 150 empty seats

American = 50 empty seats

Southwest = 70 empty seats

Download pdf
6 0
2 years ago
During a sale a store offered a 40% discount on a particular camera that was originally price at $450 after the sale the discoun
Artemon [7]

£378


$450×0.6=$270.

$270×1.4=$378

3 0
3 years ago
Which algebraic expression represents "the bagels were divided equally into fifteen bags"? 15 + b 157b StartFraction 15 Over b E
maria [59]

Answer: (d)-  \dfrac{b}{15}

Step-by-step explanation:

Suppose 'b' is the number of bagels

It is to be divided into 15 bags

So, we use the divide operator i.e.

\Rightarrow b\ \div\ \15=\dfrac{b}{15}

5 0
3 years ago
Read 2 more answers
If you rotate a triangle 180 degrees with points of (1,2), (3,3), (1,4) what would the new points be?
alexgriva [62]

Answer: when you rotate the triangle 180 degrees the new points would be (-1,-2), (-1,-4), and (-3,-3).

Step-by-step explanation:

You simply flip the graph 180 degrees. Not that hard.

8 0
3 years ago
4-8m=-8-5m what is m​
faust18 [17]

Answer:

-9m-4

Step-by-step explanation:

Move the -4 to the right hand side by adding 4 to both sides, like this: To the left hand side:

-4 + 4 = 0

9m ‹ 5m

6 0
2 years ago
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