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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

You might be interested in
If x and ​(19x+30​) are the measures of complementary​ angles, what is the measure of each​ angle?
Alisiya [41]

Answer:

3° and 87°

Step-by-step explanation:

<em>here's</em><em> your</em><em> </em><em>solution</em>

<em> </em><em>=</em><em>></em><em> </em> we know that measure of complementary angle is 90°

=>. one angle is. = x

=> other angle is .= (19x + 30)

=> so, x + 19x + 30° = 90°

=> 20x + 30° = 90°

=> 20x = 60°

=> x = 60/20

=> x = 3°

hence one angle is 3° and other is 87°

hope it helps

7 0
3 years ago
Help on this please.
dem82 [27]

Answer:

x = 46°

Step-by-step explanation:

the opposite angles of a cyclic quadrilateral are supplementary, sum to 180° , then

x + 134° = 180° ( subtract 134° from both sides )

x = 46°

8 0
2 years ago
R * p = -37.8 <br>but also<br>r + p = 13.5<br><br>what would r be?<br>what would p be?
Nana76 [90]

R * p = -37.8


Solve for either R or p.


R = -37.8/p


Now plug into R + p = 13.5


-37.8/p + p = 13.5


Solve for p.


After finding p, plug your p-value into either R + p or R*p to find R.


Take it from here.




5 0
3 years ago
Read 2 more answers
A candy shop collected the following information regarding purchases from 100 of its customers.
charle [14.2K]

Answer:

at least 25

Step-by-step explanation:

as not everybody answered the suvey, more people probable purchased only candy bars. so ar least 25.

3 0
4 years ago
Read 2 more answers
Please Help. Tristen is building 3 trophies using Legos. He needs 324 total Legos. Tristen uses 220 Legos for the largest trophy
velikii [3]

Answer:

1. The equation is given as

324 = 220 +135 + C

2. We have 166 As the correct answer but is not in the option

Step-by-step explanation:

We are been given the following values

No. of trophies = 3

Total Legos required for all trophies = 324

No. of Legos for largest trophy(A) = 220

No. of Legos for smallest trophy(B) = 135

No. of Legos required for final trophy(C) which is unknown

Total legos will addition of everything

Total Legos = [Number of Legos for largest trophy(A) + Number of Legos for smallest trophy(B) + Number of Legos required for final trophy(C)]

Substituting the values

324 = 220 +135 + C

Making C subject of formula

324 = 355 + C

324 - 355 = C

-31 = C

135 + 31 = 166

We have 166 As the answer

8 0
3 years ago
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