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tia_tia [17]
3 years ago
7

What is the vector sum of 7, 5 and 13, −5?

Mathematics
2 answers:
FrozenT [24]3 years ago
6 0
The answer is (20,0). We can determine the  sum of two vector points by adding x1 to x2 and y1 to y2. This is like adding integers, the only difference is the answer is in vector form. In here, we have (x,y). x = 7+13 and y = 5+(-5). that is why we have the (20,0) as the answer.
morpeh [17]3 years ago
3 0

Answer:

⇒Here, point , (7,5) and (13, -5) are points in two dimensional vector plane.

⇒Points in two dimensional system is same as representation of point in vector plane,where, x y plane is represented as i j , plane.

Point , (7,5) when written in vector form = 7 i + 5 j

Point , (13,-5) when written in vector form = 13 i - 5 j

⇒Addition of two vectors is same as Addition of two numbers, that is i component is added with i component, and j with j component.

So, 7 i + 5 j + 13 i - 5 j

= 7 i + 13 i + 5 j - 5 j→→[Addition of vectors is commutative,which is , a + b=b +a]

= 20 i +0 j

= 20 i

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Let
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y------> the length of the rectangular area

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y=x+15------> equation 1
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2x+2y <= 150-------> equation 2

substitute 1 in 2
2x+2*[x+15] <=150--------> 2x+2x+30 <=150----> 4x <=150-30
4x <= 120---------> x <= 30
the width of the rectangular area is at most 30 ft
y=x+15
for x=30
y=30+15------> y=45
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see the attached figure
the solution is<span> the shaded area</span>

4 0
2 years ago
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The number of tests that it would take for the probability of committing at least one type I error to be at least 0.7 is 118   .

In the question ,

it is given that ,

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the above mentioned situation can be written as

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Learn more about Error here

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Step-by-step explanation:

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