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Marysya12 [62]
3 years ago
11

4. Se contrata un bus para hacer una excursión, si se hubieran completado los asientos el costo del

Mathematics
1 answer:
Aloiza [94]3 years ago
3 0

Answer:

???

Step-by-step explanation:

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At Elisa's printing company, there are two kinds of printing presses: Model A, which can print 70 books/ day, and model B, which
Dmitrij [34]

Answer:

9 Model As.

Step-by-step explanation:

Let A represent Press A and let B represent Press B.

So, they own 14 total presses. This means that:

A+B=14

They can print 905 books per day, in other words, since A prints 70 per day and B prints 55 per day:

70A+55B=905

This is now a system of equations. Solve by substitution. From the first equation, subtract B from both sides:

A=14-B

Substitute this into the second equation: "

70(14-B)+55B=905

First, we can divide everything by 5 to simplify things:

14(14-B)+11B=181

Distribute the left:

196-14B+11B=181

Combine like terms:

-3B+196=181

Subtract 196 from both sides:

-3B=-15

Divide both sides by -3

B=5

So, the company has 5 Model B presses.

Which means that the company has 14-5 or 9 Model A presses.

And we're done!

3 0
3 years ago
At Least One Defective iPhone It has been reported that 20% of iPhones manufactured by Foxconn for a product launch did not meet
bija089 [108]
We can use the binomial theorem to find the probability that 0 out of the 15 samples will be defective, given that 20% are defective.
P(0/15) = (15C0) (0.2)^0 (1 - 0.2)^15 = (1)(1)(0.8)^15 = 0.0352
Then the probability that at least 1 is defective is equal to 1 - 0.0352 = 0.9648. This means there is a 96.48% chance that at least 1 of the 15 samples will be found defective. This is probably sufficient, though it depends on her significance level. If the usual 95% is used, then this is enough.
7 0
3 years ago
Before beginning voice lessons, Katie already knew how to sing 7 pieces, and she expects to
Nuetrik [128]

Thanks for asking your question!

Have more questions? Just ask!

Answer:

<u>7y +2x</u>

Let x = the number of weeks

Hope this helps!

8 0
3 years ago
A travel agent receives a 9% commission on the base fair of a customer- that is the fair before sales tax is added if the total
Helen [10]

Answer:

98 he should receive yodjct7

3 0
2 years ago
EASY TO ANSWER FOR EASY TOKENS PLEASE HELP
Nitella [24]

Answer:


Step-by-step explanation:


4 0
3 years ago
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