Please help fassttttt

Mathematics

1 answer:

Sphinxa [80]3 years ago

4 0

Answer:

Step-by-step explanation:

h = 20 + 1.7 + 50 = 71.7 m

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Thepotemich [5.8K]

Answer:

p = 18

Step-by-step explanation:

given : n = -3

p = 2n^2

p=2*(-3)^2

p=2*8

p=18

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3 years ago

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Determine whether each piece of given information alone is sufficient to prove quadrilateral ABCD is parallelogram. Justify your

miss Akunina [59]

Answer:

No (the attachment show the evidence)

Step-by-step explanation:

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3 years ago

Find nth term of -15,-18,-21.....

Sidana [21]

t ( n ) = - 3n - 12

...............................

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A 15 kilogram object is suspended from the end of a vertically hanging spring stretches the spring 1/3 meters. At time t = 0, th

Yuri [45]

Answer:

$15\frac{d^{2}y(t)}{dt^{2} } - 441.45y(t) =$ ± $170 cos(5t)$

$y(0)=0$ , $y'(0)=0$

Step-by-step explanation:

See the attached image

This problem involves Newton's 2nd Law which is: ∑F = ma, we have that the acting forces on the mass-spring system are: $F_{r} (t)$ that correspond to the force of resistance on the mass by the action of the spring and $F(t)$ that is an external force with unknown direction (that does not specify in the enounce).

For determinate $F_{r} (t)$ we can use Hooke's Law given by the formula $F_{r} (t) = k y(t)$ where $k$ correspond to the elastic constant of the spring and $y(t)$ correspond to the relative displacement of the mass-spring system with respect of his rest state.