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2 years ago

Pls help thanksssssss

Mathematics

1 answer:

Helen [10]2 years ago

8 0

Answer:

i have no idea

Step-by-step explanation:

i actually dont know but thnks for the points BTW

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What is the greatest common factor of 42, 126, and 210 ?

son4ous [18]

Prime factors of 42: 2x7x3
prime factors of 126: 2x3x3x7
prime factors of 210: 7x3x5x2
now we multiply all the factors that they all have in common: 2x3x7 which is 42. So the highest common factor is 42

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3 years ago

Describe the graph of the function. y = 2x2 + 12x – 15

andriy [413]

The gaph should be a parabola

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3 years ago

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The diagonals of a rhombus bisect each other of measures 8cm and 6cm .Find its perimeter. please help !!!!!!!!!!!!!!!!!!!!!!!!

Delvig [45]

Answer:

20 cm

Step-by-step explanation:

8/2 = 4

6/2 = 3

3 and 4 are the sides of the triangle (four triangles in rhombus)

$a^{2} + b^{2} = c^{2} \\4^{2} + 3^{2} = c^{2}$

c = 5

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3 years ago

Solve the following equation for x.

diamong [38]

Answer:

b -10

hope this helps i think

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3 years ago

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The equation r(t)= (3t+9)i+(sqrt(2)t)j+(t^2)k is the position of a particle in space at time t. Find the angle between the veloc

andreev551 [17]

Answer:

$\theta= \frac{\pi}{2} +\pi \cdot i$ , for all $i = \mathbb{Z} \cup\{0\}$

Step-by-step explanation:

The velocity vector is found by deriving the position vector depending on the time:

$\dot r(t)= v (t) = 3 \cdot i +\sqrt{2} \cdot j + 2\cdot t \cdot k$

In turn, acceleration vector is found by deriving the velocity vector depending on time:

$\ddot r(t) = \dot v(t) = a(t) = 2 \cdot k$

Velocity and acceleration vectors at $t = 0$ are:

$v(0) = 3\cdot i + \sqrt{2} \cdot j\\a(0) = 2 \cdot k\\$

Norms of both vectors are, respectively:

$||v(0)||\approx 3.317\\||a(0)|| \approx 2$

The angle between both vectors is determined by using the following characteristic of a Dot Product:

$\theta = \cos^{-1}(\frac{v(0) \bullet a(0)}{||v(0)||\cdot ||a(0)||})$

Given that cosine has a periodicity of $\pi$ . There is a family of solutions with the form:

$\theta= \frac{\pi}{2} +\pi \cdot i$ , for all $i = \mathbb{Z} \cup\{0\}$

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3 years ago