Ask question

Ask question

All categories

3 years ago

15

HELP NEED ASAP!!!!!!

1 answer:

Sunny_sXe [5.5K]3 years ago

5 0

Answer:

the answer is a

Step-by-step explanation:

the answer is a the answer is a the answer is a

You might be interested in

Let r3 have the euclidean inner product. let u = (-1, 1, 1) and v = (-7, 6, 15). if ||ku + v||= 7, what is k? give the exact ans

amm1812

Ma $k\mathbf u+\mathbf v=k(-1,1,1)+(-7,6,15)=(-k-7,k+6,k+15)$

Recall that for a vector $\mathbf x\in\mathbb R^n$ , we have $\|\mathbf x\|=\sqrt{\mathbf x\cdot\mathbf x}$ . So we have

$\|k\mathbf u+\mathbf v\|=\sqrt{(k\mathbf u+\mathbf v)(k\mathbf u+\mathbf v)}=7$
$\implies k^2\mathbf u\cdot\mathbf u+2k\mathbf u\cdot\mathbf v+\mathbf v\cdot\mathbf v=49$
$\implies3k^2+56k+261=0$
$\implies k=-9,-\dfrac{29}3$

3 0

3 years ago

Your bathtub has 12 gallons of water in it and you start to drain it. The water drains at a constant rate of 1/2

erastova [34]

Step-by-step explanation:

All ik is that its gonna take 10 minutes to drain.

6 0

3 years ago

Which SI unit is appropriate for measuring the height of a person? A. feet B. meters C. grams D. kilometers

Lerok [7]

The appropriate SI unit for measuring the height of a person is meters.

3 0

3 years ago

An airplane pilot over the Pacific sights an atoll at an angle of depression of 5 . At this time, the horizontal distance from t

Aleonysh [2.5K]

Answer:

404.98 m

Step-by-step explanation:

The angle of depression is 5°

The horizontal distance from the airplane to the atoll is 4629 meters.

We need to find the height of the plane.

If we consider a triangle. 4629 meters will be the base and angle is 5°. Let h is the height of the plane. Using trigonometry to find it :

$\tan\theta=\dfrac{x}{4629 }\\\\\tan(5)=\dfrac{x}{4629 }\\\\x=\tan(5)\times 4629 \\\\x=404.98\ m$

So, the height of the plane is 404.98 m.

6 0

3 years ago

What is 3/4 divided by 1/4

Over [174]

Answer:

3

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers