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Fed [463]
3 years ago
8

Find the angle between the given vector in degrees. u=<6, 4>, v=<7, 5> HELPPPPPPPPPP

Mathematics
1 answer:
Paladinen [302]3 years ago
7 0

Recall that

\vec a\cdot\vec b=\|\vec a\|\|\vec b\|\cos\theta

where \theta is the angle between the vectors \vec a,\vec b whose magnitudes are \|\vec a\|,\|\vec b\|, respectively.

We have

\langle6,4\rangle\cdot\langle7,5\rangle=\sqrt{6^2+4^2}\sqrt{7^2+5^2}\cos\theta

\cos\theta=\dfrac{31}{\sqrt{962}}\implies\theta\approx88.2^\circ

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Planes A and B intersect in line s. If point Vis a point on line s, then it lies on:
Trava [24]

Answer:

Option C.

Step-by-step explanation:

It is given that planes A and B intersect in line s.

It means, all points lie on the line s must be lie on both plane A and B because s is the line of intersection of both plane A and B.

It is given that V is a point on line s.

Since, the point V lies on line s, therefore it is also lies on both plane A and B.

Hence, the correct option is C.

7 0
3 years ago
Find the value of xxx in the isosceles triangle shown below.
Ivahew [28]

Answer:

x=10\ units

Step-by-step explanation:

<u><em>The picture of the question in the attached figure</em></u>

we know that

The height of an isosceles triangle divide the triangle into two congruent right triangles.

so

Applying the Pythagorean Theorem

(\sqrt{74})^2 =7^2+(\frac{x}{2})^2

solve for x

74 =49+\frac{x^2}{4}

\frac{x^2}{4}=74-49

\frac{x^2}{4}=25

x^2=100\\x=10\ units

4 0
3 years ago
HELP ASAP <br> What are the square roots of 36 /100?
Vanyuwa [196]

sqrt(36/100) = +-6/10

You find the square root of the numerator and the denominator.

3 0
3 years ago
F(x)=-x^2+3 pls help
Paha777 [63]

Answer:

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.-(-2)^2 +3 = -4 +3 = -1

3 0
3 years ago
EASY BRAINLIEST PLEASE HELP!!
Galina-37 [17]

Answer: B

Step-by-step explanation: its B

8 0
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