MATHEMATICS HIGH SCHOOL

Perpendicular Vectors:Find v x w if v=5i -4j +4k & w=-6i +3j -2k.
A. 3i-4j-2k
B. -14i-9j-4k
C. 5i +3j -4k
D. -4i -14j -9k

Find v x w if v=-3i-4j-8k & w=2i+6j+4k.
A. 12i -2j +3k
B. 8i +12j +32k
C. 32i -4j -10k
D. 10 i -8j +3k

Find the cross product <-6, 7, 2> x <8, 5, -3>. Is the resulting vector perpendicular to the given vectors?
A. <-31,-2,-86>;yes
B. <-37,-2,0>; no
C. <0,-86,-37>; yes
D. <-37, 0, -80>;no

Answers

Answer 1

Answer: 1.
v x w = 8 i - 24 j + 15 k + 10 j - 12 i - 24 k =
= - 4 i - 14 j - 9 k
Answer: D )
2.
v x w = -16 i - 16 j - 18 k + 12 j + 48 i - 8 k =
= 32 i - 4 j - 10 k
Answer: C )
3.
The cross product:
< - 6, 7, 2 > x < 8, 5, -3 > =
= - 21 i + 16 j - 30 k - 18 j - 10 i - 56 k =
= - 31 j - 2 j - 86 k = < - 31, - 2, - 86 >
Vectors are perpendicular if: cos ( u, v ) = 0
< - 6 , 7. 2 > * < -31, - 2, - 86 > = 186 - 14 - 172 = 0
< 8, 5 , - 3 > * < - 31, - 2, - 86 > = -248 - 10 + 258 = 0
Answer: A ) < - 31, - 2 , - 86 >, yes.

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Answers

That make no sense, A = D, B = E, and C = C.

Answer:

?

Step-by-step explanation:

Solve.- t/5 ≥ 15

A.
t ≤ –75

B.
t ≥ –75

C.
t ≤ –3

D.
t ≥ –3

Answers

Multiply -5 to both sides. -5 x 15 = -75, so t ≥ -75 would be your answer. :)

$-(t)/(5) \geq 15$

$-5 * (-(t)/(5)) \geq 15 * (-5)$

$t \geq -75$

A polynomial function has roots –5 and 1. Which of the following could represent this function?

Answers

Answer: f(x)=(x+5)(x-1)

Step-by-step explanation:

got it right on edge

Answer:

-5

Step-by-step explanation:

Solve: 3x + 1 = 3

With working out

Answers

$3x + 1 = 3 \n \n3x + 1-1 = 3 -1\n \n 3x = 2 \n \n (3x)/(3) = (2)/(3) \n \n x = (2)/(3)$

$3x+1 =3 \n \n 3x =3 -1 \n \n 3x =2 \n \n \n (3x)/(3) = (2)/(3) \n \n x = (2)/(3) \n \n \framebox[1.1\width]{Good Luck!} \par$

Real fourth roots of 256

Answers

I'd solved in pic. Please see the pic.

Pansexual is bisexual is every steps smh

Answers

Answer:

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Step-by-step explanation:

Answer:

true///its just that pans are into all genders while bi are into the 2 main gender spectrum

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