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zhannawk [14.2K]
3 years ago
5

Find the dot product of the given vectors. u=9i+4j v=3i−j

Mathematics
1 answer:
Shkiper50 [21]3 years ago
5 0

Answer:

23

Step-by-step explanation:

By definition of dot-product

sum the corresponding products.

u * v =  <9, 4> *<3, -1> = 9*3 + 4*(-1) = 27 -4 = 23

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SR = 3, RT = 1, ST =
White raven [17]

Answer:

since R seems to be in middle between ST

ST=3+1=4

Step-by-step explanation:

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3 years ago
An investment firm wants to create a billboard that displays an enlarged $1,000,000 bill. The actual size of the bill is 2.61 in
Mandarinka [93]

We know how wide the billboard will be. Therefore, to know how much the original image should be enlarged, you must divide the final width of the billboard between the current width of the invoice.

We know both data, then we perform the operation:

48 feet /6.14 inches = 7.81 feet / inches .


Therefore the correct answer is option D. 1″ = 7.81′

For the bill to cover the billboard, the bill must be expanded by a factor of 7.81 feet long per inch long that has the original image.

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3 years ago
Which number sentence shows the correct placement of the decimal point in the product, based on the two factors?
Lana71 [14]

2.52 * 27.94 = 70.4088, so not that one

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Answer:

D. 25.07 * 5.4 = 135.378

3 0
3 years ago
Read 2 more answers
Answer all for Brainliest (easy math) 5 questions for 30 points
sweet-ann [11.9K]

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2) Substitute the known values into the equation. There are 7 people at $8.25 a person, which is a total of $57.75 <u>I used 7 because he invites 6 friends, plus himself. </u>He only has $50 on his gift card, so he won't have enough to cover the cost. The answer is A.

3) They start out with 40lbs and recieve 120 more. They have 160lbs in total. If they sell 8lbs a day for 5 days, thats 8*5 or 40lbs total. 160 - 40 = 120lbs left after 5 days. I'd say the answers are A, B, and D.

4) I think the answer would be C because 1,500 is used to find the number of grams of isotope present after t years. The number of grams can't be 1,500. I hope that makes sense because I'm not sure how to explain it.

5) The growth factor is 2 (2x, x being the number of hours). Multiply by 15 because the lab has 15 of them. The answer is B. f(x) = 15 * 2x

I hope this helps you! I'm sorry if I got any of them wrong!

7 0
3 years ago
Mr. Smith is ordering steaks to serve at a poker game with his friends. The first company charges a delivery fee of $10 plus $15
gregori [183]

Answer:

he would have to order 3 steaks from the first company and 3 from the second

Step-by-step explanation:

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