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Rama09 [41]
3 years ago
11

Find the Dot Product if u=8i-7j and v=3i-4j?

Mathematics
1 answer:
Feliz [49]3 years ago
4 0

Answer:

52

Step-by-step explanation:

If u=(a1i+b1j)=(a1,b1) and v=(a2i+b2j)=(a2,b2), then the dot (scalar) product is:

u.v=(a1,b1).(a2,b2)

a1b1+a2b2

 u.v=(8,-7).(3,−4)

(8)(3)+(-7)(−4)

24+28=52

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A fast-food company is interested in knowing the probability of whether a customer viewed an advertisement for their new special
lord [1]

Answer:

45% probability that a randomly selected customer saw the advertisement on the internet or on television

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that a customer saw the advertisement on the internet.

B is the probability that a customer saw the advertisement on television.

We have that:

A = a + (A \cap B)

In which a is the probability that a customer saw the advertisement on the internet but not on television and A \cap B is the probability that the customers saw the advertisement in both the internet and on television.

By the same logic, we have that:

B = b + (A \cap B)

12% saw it on both the internet and on television.

This means that A \cap B = 0.12

20% saw it on television

This means that B = 0.2

37% of customers saw the advertisement on the internet

This means that A = 0.37

What is the probability that a randomly selected customer saw the advertisement on the internet or on television

A \cup B = A + B - (A \cap B) = 0.37 + 0.2 - 0.12 = 0.45

45% probability that a randomly selected customer saw the advertisement on the internet or on television

6 0
3 years ago
Write 10 5/12 as an equevilent improper fraction
dexar [7]
10 5/12 can be turned into a improper fraction by multiplying 10 and 12. You get 120. Then you can add 5 and get 125/12.

THE ANSWER IS 125/12!
5 0
3 years ago
Read 2 more answers
87 oz to lb to oz pls help still new and im stupid
Gekata [30.6K]

Answer:

5.4375 Pounds (lb)

Step-by-step explanation:

By using the calculator, and dont call your self stupid we all need help sometimes

8 0
3 years ago
Lines a and b are parallel.
Wittaler [7]

m and 125º are supplementary angles:

m + 125º = 180º

m = 180º <span>– 125º

</span>m = 5<span>5º  <</span>——<span>—    this is the answer.


I hope this helps. =)

</span>
6 0
3 years ago
Read 2 more answers
Item 5
Sedbober [7]

Answer: 300.3858/ maybe 300.385

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3 0
2 years ago
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