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Monica [59]
3 years ago
13

Vector a = 4i + 5jVector b = 3i + 6jFind the dot product.

Mathematics
2 answers:
Vedmedyk [2.9K]3 years ago
8 0

Answer:

42

Step-by-step explanation:

a*b = 4*3 + 5*6 = 12 + 30 ( where i*i = j*j = 1)

∴ a*b = 42

umka21 [38]3 years ago
5 0

Step-by-step explanation:

a · b = (4)(3) + (5)(6)

a · b = 12 + 30

a · b = 42

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Given the equation of two lines how can I distinguish if these lines are parallel, perpendicular, or neither?
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6 0
4 years ago
What is the area of the rhombus?
nikklg [1K]

Answer:

if you need the formula, it is pq/2

Step-by-step explanation:

the "p" is a diagonal of the rhombus

the "q" is the other diagonal of the rhombus

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5 0
3 years ago
4. He drove at Puerto Princesa City to Taytay at an average speed of 40 kph
dexar [7]

Step-by-step explanation:

Distance = Speed x Time

Given Distance = 40km/h or kph

Time = 5 hours 15 minutes

=

5 \frac{15}{60}  \\  = 5 \frac{1}{4} \\  = 5.25hours

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7 0
3 years ago
What is the answer to 6(-3-4y) simplifying algebriac expressions
Mekhanik [1.2K]

Answer:

-18 - 24y.

Step-by-step explanation:

6(-3-4y)

We use the distributive law to give:

6 * -3 + 6* -4y

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6 0
3 years ago
Use the distributive property.<br> -7(-2w-2y+4)
AVprozaik [17]

Answer:

14w + 14y - 28

Step-by-step explanation:

-7(-2w - 2y + 4)

Distribute:

14w + 14y - 28

<em>good luck, hope this helps :)</em>

3 0
3 years ago
Read 2 more answers
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