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laiz [17]
3 years ago
14

the sides of a square are each multiplied by 3 to firm a new square. If the area of the original was K, then the area of the squ

are is what? PLEASE EXPLAIN THE ANSWER :(

Mathematics
1 answer:
Keith_Richards [23]3 years ago
5 0
The area of the new square is 9k. For example if in the original square, each side was 2, then k=4. 2*3=6 so each side would be 6 long. 6*6 is 36 so the new square's area is 9 times the original.
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7,14,21,28,35, __
8_murik_8 [283]

Answer:

the patters is that they are multiple of 7.. so next number is 42.

which means option D <u>The missing number is even</u> is correct..

6 0
2 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 domain of the function shown in the graph below?
Maksim231197 [3]

Answer:

Domain: (+∞, -∞)

Step-by-step explanation:

Domain = x value

hope it helps

6 0
3 years ago
A parallelogram has coordinates A(1, 1), B(5, 4), C(7, 1), and D(3, -2). What are the coordinates of parallelogram A′B′C′D′ afte
andrezito [222]

Answer:

C I think

Step-by-step explanation:

6 0
3 years ago
A lap around a track is 2/5 of a mile. how many laps is a 1 1/2 mile race?
sergiy2304 [10]

Answer:

3 3/4

Step-by-step explanation:

3/2/2/5 = 15/4

15/4 = 3 3/4

4 0
3 years ago
Read 2 more answers
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