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monitta
2 years ago
13

Given vectors u = -9i + 8j and v= 7i + 5j find 2u -6v in terms of unit vectors i and j

Mathematics
2 answers:
Nesterboy [21]2 years ago
8 0

Answer:

A on edge

Step-by-step explanation:

Aloiza [94]2 years ago
7 0

Answer: - 60i - 14j

Step-by-step explanation:

- 18i + 16j  - 42i - 30j = - 60i - 14j

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Answer:

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In a fraction with a denominator of 15, which value could the numerator be to produce a repeating decimal? A) 9 B) 11 C) 12 D) 1
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2. Circle C, has center (0,0) and radius 2.
adell [148]

Answer:

2. x ²  +  y ² =  4

3. x² + y² = 23

Step-by-step explanation:

The equation of a circle with center  

( a , b )  and radius  r  is:

( x − a )²   +  ( y − b ) ² =  r ²

Explanation:

Here,

 a = 0 ,  b = 0 ,  r = 2  

The equation is:

( x -0 ) ² +  ( y -0 ) ² =  ( 2  ) ²

that is:  x ²  +  y ² =  4  

Thus:

x ²  +  y ² =  4

3. Each point on a circle has the same distance from the center. This distance is the radius  r  of the circle.

 Here, ( -3 , 4 )  is a point on the circle, meaning that the radius of the circle is the distance between  ( 0 , 0 ) , the center, and  ( -3 , 4 ) .

thus  a circle centered on the origin will have an equation of:

x² + y² =r²

And,  ( -3 , 4 )  lies on the circle, we have:

(-3)² + (4)² = r²

9 + 14 = 23

substituting;

x² + y² = 23

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2 years ago
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