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3 years ago

I need the answer real quick will someone help me

Mathematics

1 answer:

fenix001 [56]3 years ago

7 0

More info plz there is no context

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The answer is C, which is 17+5(n- 1).

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3 years ago

Find the angle between u = (-2,-5) and v = (5,2)

OleMash [197]

The angle between u = (-2,-5) and v = (5,2) is 134 degrees approximately.

Solution:

Given, two vectors are u = (-2, -5) and v = (5, 2)

We have to find the angle between two vectors.

We know that,

$a. b=\|a\| .\|b\| \times \cos \theta$

where $\theta$ is angle between vectors a and b

$\text { Now vectors are }(-2 \vec{\imath}-5 \vec{\jmath}) \text { and }(5 \vec{\imath}+2 \vec{\jmath})$

$(-2 \vec{\imath}-5 \vec{\jmath}) \cdot(5 \vec{\imath}+2 \vec{\jmath})=\sqrt{(-2)^{2}+(-5)^{2}} \times \sqrt{5^{2}+2^{2}} \times \cos \theta$

$\text { since }\|a\|=\sqrt{x^{2}+y^{2}} \text { for } a=x \vec{\imath}+y \vec{\jmath}$

$\begin{array}{l}{-10-10=\sqrt{29} \times \sqrt{29} \times \cos \theta} \\\\ {-20=29 \times \cos \theta} \\\\ {\cos \theta=\frac{-20}{29}} \\\\ {\theta=\cos ^{-1} \frac{-20}{29}} \\\\ {\theta=133.60}\end{array}$

Hence, the angle between given two vectors is 134 degrees approximately.

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3 years ago

What is 7.7 kilograms x 17 answer must be in kilograms

Andrew [12]

Answer:

The correct answer is 130.9 kilograms.

Step-by-step explanation:

We want to calculate what is the result of 7.7 kilograms multiplied by 17 and the answer should be in kilograms

Result = 7.7 kilograms * 17

Result = 7.7 * 17

Result = 130.9

Result = 130.9 kilograms

The result of the multiplication of 7.7 kilograms by 17 is exactly 130.9 kilograms

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2 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

When 8 is subtracted from a certain number and the result is multoplied by 3

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15
15 - 8 = 7
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3 years ago

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