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3 years ago

11

How is the answer 35? How do I get it?

1 answer:

vlabodo [156]3 years ago

7 0

I think it's -35. The steps to get that number is subtracting the 3 to the right side. Then you have -2 - 3 which equals to -5. Then you still have x/7= -5. Get rid of 7 from the x and do the same thing to the other side but you multiply 7 and -5. Last you your would be x= -35.

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Read 2 more answers

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3 years ago

Someone please solve question b please with working really stuck much appreciated!

Lapatulllka [165]

Answer:

a) $t=\sqrt{\frac{d}{4.9}}$

b) $t=0.25 s$

Step-by-step explanation:

a) We have the following equation:

$t=\sqrt{\frac{2d}{9.8}}$ (1)

Where $t$ is the time is seconds, $d$ is the distance in meters and $9.8 m/s^{2}$ is the acceleration due gravity

If we divide numerator and denominator inside the square root by 2:

$t=\sqrt{\frac{2d/2}{9.8/2}}$

We will have:

$t=\sqrt{\frac{d}{4.9}}$

Hence:

$?=4.9$

b) Using the same equation (1) with thw following data:

$d=32 cm \frac{1 m}{100 cm}=0.32 m$

$t=\sqrt{\frac{2(0.32 m)}{9.8 m/s^{2}}}$

We will have the reaction time:

$t=0.25 s$

3 0

3 years ago