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Temka [501]
3 years ago
10

The distance d of a particle moving in a straight line is given by d(t) = 2t3 + 5t – 2, where t is given in seconds and d is mea

sured in meters. Find an expression for the instantaneous velocity v(t) of the particle at any given point in time.
Mathematics
1 answer:
Sedaia [141]3 years ago
8 0

Answer:

Step-by-step explanation:

hello,

v(t)=\dfrac{d(t)}{t}=2t^2+5-\dfrac{2}{t}

hope this helps

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Hey i need help with system of equations.<br> i uploaded a doxs file you can onpen it in google docs
Art [367]

Answer:

<h2>PART A: x = 15 and y = -8</h2><h2>PART B: x = -5 and y = 3</h2>

Step-by-step explanation:

PART A:

The first equation is x + y = 7\\y = 7 - x  .............(a)

The second equation is 3x - 2y = 1\\2y = 3x - 1

Putting the value of y from (a) in the above equation, we get 2y = 3x - 1\\2(7 - x) = 3x - 1\\14 - 2x = 3x - 1\\x = 15

From (a) we get y = 7 - x = 7 - 15 = -8

PART B:

Here the system of equations are -x + 4y = 17........(a) and 3x - 5y = -30.........(b)

From (a) we get, x = 4y - 17

Putting the above value of x in (b) we get, 3x - 5y = -30\\3(4y - 17) - 5y = -30\\12y - 51 - 5y = -30\\7y = 21\\y = 3

Hence, x = 4y - 17 = 12 - 17 = -5

3 0
3 years ago
A carpenter brought a piece of wood that was 12 centimeters long. Then he sawed 24.53 centimeters off the end. How long is the p
katrin2010 [14]

Answer:

12cm long x 24cm = Area 268cm

24,53cm height was cut off this we are not given the length, so this stays 24.53cm.

The 12cm length has been altered.

Step-by-step explanation:

6 0
3 years ago
Hey, can I please get some help with this? It shouldn’t be too hard, thanks!
Fynjy0 [20]

Answer:

  • (x -3)(x+3)(2x +1)
  • (x -1)(x +1)(x +3)
  • (2x -1)(2x +1)(x -4)

Step-by-step explanation:

A) 2x³ +x² -18x -9 = x²(2x +1) -9(2x +1) = (x² -9)(2x +1) = (x -3)(x+3)(2x +1)

__

B) x³ +3x² -x -3 = x²(x +3) -1(x +3) = (x² -1)(x +3) = (x -1)(x +1)(x +3)

__

C) 4x³ -16x² -x +4 = 4x²(x -4) -1(x -4) = (4x² -1)(x -4) = (2x -1)(2x +1)(x -4)

_____

In each case, the third-level factoring mentioned in step 4 is the factoring of the difference of squares: a² -b² = (a -b)(a +b).

_____

The step-by-step is exactly what you need to do. It is simply a matter of following those instructions. You do have to be able to recognize the common factors of a pair of terms. That will be the GCF of the numbers and the least powers of the common variables.

7 0
2 years ago
I’m looking for a girl friend;)
il63 [147K]

Answer:

Wsp

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the value of f(−1)f(−1) when f(x)=2x 2 ? enter your answer in the box. f(−1)=
sergiy2304 [10]
I hope this helps you




x= -1



f (-1)= 2. (-1)^2


f (-1)= 2.1


f (-1)= 2
6 0
3 years ago
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