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klio [65]
2 years ago
5

Can anyone help me please!!!!!!!!!!!

Mathematics
1 answer:
Alja [10]2 years ago
8 0

Answer:

a) 45

Step-by-step explanation:

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[20points][Precal] Find the cross product of -(3/4)V and (1/2)w if v = <-2, 12, -3> and w = <-7, 4, -6>
Lana71 [14]
\mathbf v=\langle-2,12,-3\rangle=-2\,\vec i+12\,\vec j-3\,\vec k
-\dfrac34\mathbf v=\dfrac32\,\vec i-9\,\vec j+\dfrac94\,\vec k

\mathbf w=\langle-7,4,-6\rangle=-7\,\vec i+4\,\vec j-6\,\vec k
\dfrac12\mathbf w=-\dfrac72\,\vec i+2\,\vec j-3\,\vec k

-\dfrac34\mathbf v\times\dfrac12\mathbf w=\begin{vmatrix}\vec i&\vec j&\vec k\\\frac32&-9&\frac94\\-\frac72&2&-3\end{vmatrix}
=\left((-9)\times(-3)-\dfrac94\times2\right)\,\vec i-\left(\dfrac32\times(-3)-\dfrac94\times\left(-\dfrac72\right)\right)\,\vec j+\left(\dfrac32\times2-(-9)\times\left(-\dfrac72\right)\right)\,\vec k
=\dfrac{45}2\,\vec i-\dfrac{27}8\,\vec j-\dfrac{57}2\,\vec k=\left\langle\dfrac{45}2,-\dfrac{27}8,-\dfrac{57}2\right\rangle
6 0
3 years ago
Can someone simplify the expression?
SSSSS [86.1K]
<h3>✽ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ✽</h3>

➷ 2^3 = 8

2^2 = 4

2(8 - 4) = 8

The answer is 8

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

3 0
3 years ago
What is the value of 10% of 60​
Yanka [14]
10% of 60 is 6. It’s very simple
7 0
3 years ago
Read 2 more answers
Help me out pleaseee
Kay [80]
Please repost a clear picture so I can help, Thanks.
4 0
3 years ago
What is the value of x?
ser-zykov [4K]

I think it is 20.

3x=x+40

2x=40

x=20

5 0
3 years ago
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