Ask question

Ask question

All categories

Vedmedyk [2.9K]

2 years ago

6

Jack and Diane want to meet for breakfast. Jack walks 1.5 mph and Diane walks 1 mph. They started 5 miles apart from each other.

How long does it take them to meet up?

1 answer:

max2010maxim [7]2 years ago

7 0

Answer:

jack take 3.33 hours and diane would take 5 hours

Step-by-step explanation:

You might be interested in

Please help (: !!

Yuki888 [10]

Add more information <span />

4 0

3 years ago

If a=i+7j+k and b=i+11j+k, find a unit vector with positive first coordinate orthogonal to both a and

Scilla [17]

Take the cross product, then normalize the result.

$\mathbf a\times\mathbf b=\begin{vmatrix}\mathbf i&\mathbf j&\mathbf k\\1&7&1\\1&11&1\end{vmatrix}=-4\,\mathbf i+4\,\mathbf k$

This has norm

$\|\mathbf a\times\mathbf b\|=\sqrt{(-4)^2+4^2}=4\sqrt2$

and so a unit vector orthogonal to both given vectors is

$\dfrac{\mathbf a\times\mathbf b}{\|\mathbf a\times\mathbf b\|}=-\dfrac1{\sqrt2}\,\mathbf i+\dfrac1{\sqrt2}\,\mathbf k$

An equally correct answer would be the negative of this vector, since $\mathbf b\times\mathbf a=-\mathbf a\times\mathbf b$ .

5 0

3 years ago

What is the equation of the graphed line written in standard form?

Leno4ka [110]

Answer:

x= -3

Step-by-step explanation:

x equals to -3 is the standard form

5 0

3 years ago

Read 2 more answers

What is the similarity ratio (scale factor) of the larger triangle to the smaller triangle?

UkoKoshka [18]

Answer:

5/11

Step-by-step explanation:

<u>Corresponding side have same ratio:</u>

55/121 = 5/11 (divide by 11)
40/88 = 5/11 (divide by 8)
30/66 = 5/11 (divide by 6)

The similarity ratio or the scale factor of the larger triangle to the smaller is 5/11

5 0

2 years ago

Read 2 more answers

What is the answer to this inequality 84 is no less than 7 times a number k

lyudmila [28]

84 is no less than 7 times K, 84 divided by 7= 12,

K=12

5 0

3 years ago

Read 2 more answers