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4 years ago

P(x)=2x^3+5x^2-2x-5 find the zeros

Mathematics

1 answer:

pav-90 [236]4 years ago

7 0

Answer:

x-5=0\\x=5

Step-by-step explanation:

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PLEASE ANSWER QUICKLY! <br> 7&8!!!

hodyreva [135]

Look at mâthwáy it will help a lot !!! i promise !

6 0

3 years ago

A steel ball is dropped from a building’s roof and passes a window, taking 0.125 s to fall from the top to the bottom of the win

Anna35 [415]

Answer:

20.425 m

Step-by-step explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

$s=ut+\frac{1}{2}at^2\\\Rightarrow u=\frac{s-\frac{1}{2}at^2}{t}\\\Rightarrow u=\frac{1.2-\frac{1}{2}\times 9.81\times 0.125^2}{0.125}\\\Rightarrow u=8.98\ m/s$

Now this will the final velocity when it reaches the top of the window

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{8.98^2-0^2}{2\times 9.81}\\\Rightarrow s=4.11\ m$

$v=u+at\\\Rightarrow v=8.98+9.81\times 0.125\\\Rightarrow v=10.21\ m/s$

If the upward flight is an exact reverse of the downward flight then the time taken while going down will be 1 second and going up will be 1 second.

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=10.21\times 1+\frac{1}{2}\times 9.81\times 1^2\\\Rightarrow s=15.115\ m$

Hence total height of the building is 4.11+1.2+15.115 = 20.425 m

4 0

4 years ago

Evan makes cards numbered 1-18 and places them in a bag. What is the probability that he will pull out an even number, replace t

lubasha [3.4K]

Answer:

1-8

Step-by-step explanation:

6 0

3 years ago

5. Solve for x:<br> | 5x – 4 =16

Natali5045456 [20]

Answer:

x=4

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Thirteen equal minus two (y minus four ) plus three y

Sav [38]

Answer:

Step-by-step explanation:

13 = -2(y - 4) + 3y

13 = -2y + 8 + 3y

13 = y + 8

5 = y

y = 5

6 0

3 years ago

Read 2 more answers